Project Horizon: Everything We Know About Alton Towers' Next Big Ride

What’s the latest update for Project Horizon…….

Somewhere behind The World of David Walliams and the now-closed Alton Towers Dungeon sits one of the strangest stories in the park's recent history: a roller coaster that was announced, planned, approved, priced at £12.5 million, and then... largely stopped in its tracks. If you've heard fans and forums whispering about "Project Horizon" and wondered what on earth they're talking about, this is your complete guide — what it is, where it's going, why it's taken so long, and what it actually means for anyone planning a visit to the park. This is a genuinely unusual case study in how modern theme park development works, and it's worth understanding properly rather than just waiting for a headline announcement, because the story of Project Horizon tells you a lot about the pressures Alton Towers is currently operating under.

What Is Project Horizon? Project Horizon is the codename for a proposed new indoor attraction at Alton Towers, first revealed to the public in September 2022. Unlike most ride announcements, which tend to arrive as a slick marketing reveal complete with concept art and a countdown clock, Project Horizon began life in the least glamorous way imaginable: a public consultation leaflet posted through the letterboxes of local residents, inviting them to attend an exhibition about proposed development on the site. That's an important detail, because it tells you something about how Alton Towers actually operates behind the scenes. Before Merlin Entertainments can build anything of real scale, they need planning permission from Staffordshire Moorlands District Council, and that process legally requires consultation with the people who live nearby. Local residents genuinely knew about Project Horizon's existence before most fans and visitors did — a pattern worth remembering any time you hear rumours about a "secret" new ride, since the paper trail for anything requiring a new building almost always starts with the council, not with Alton Towers' own marketing team.

Where It's Being Built Project Horizon's home is a patch of land in an area long nicknamed "Coaster Corner" by enthusiasts — the site of the old Alton Mouse roller coaster, which closed all the way back in 1991. For over three decades, this corner of the park has functioned mainly as a maintenance and storage yard, tucked out of the way in the backstage area to the west of The World of David Walliams and the Alton Towers Dungeon. It's a slightly unusual spot for a headline new attraction. It doesn't sit within any of the park's existing themed lands in the way Forbidden Valley or Mutiny Bay do, and its entrance is specifically positioned outside The World of David Walliams rather than blending into one of the resort's established zones. That's led to a fair bit of fan speculation about whether Project Horizon might end up as something of an "island" attraction with its own distinct identity, rather than an extension of an existing area — though without confirmed theming, this remains guesswork.

The Planning Journey So Far The public consultation in September 2022 was followed within weeks by the submission of a full planning application to Staffordshire Moorlands District Council in early October 2022. That application described the removal of the existing storage and maintenance structures on site and the construction of an entirely new building to house an indoor attraction, along with the associated groundworks, infrastructure and landscaping needed to support it. Planning applications for major visitor attractions rarely move quickly, and Project Horizon was no exception. It took until 16th February 2023 for Staffordshire Moorlands' Planning Applications Committee to formally vote on the proposal, ultimately approving it in line with the planning officer's recommendation — though the officer's own report described it as a "complex and finely balanced case," a phrase that suggests the decision wasn't entirely straightforward, likely reflecting the tension between the site's rural setting and the scale of the proposed new building. That approval was, in many ways, the easy part. Planning permission gives Alton Towers the legal right to build; it doesn't obligate them to actually do it on any particular timeline, and it certainly doesn't guarantee the funding will be there when the time comes. That distinction has turned out to matter a great deal.

What We Know About the Building Even without official confirmation of what the finished ride will actually be, the planning documents themselves reveal a surprising amount of detail about the physical building that will house it, because construction plans have to specify exact dimensions and materials for approval. The main attraction building is set to measure approximately 71 metres in length by 46 metres in width, standing around 19.4 metres tall — comparable in footprint to the main façade-fronted section of Blackpool Pleasure Beach's Valhalla dark ride, for anyone wanting a rough sense of scale. A smaller entrance room, roughly 40 metres by 10 metres, is attached to the front (eastern) side of the main structure, facing out toward guests. The building itself will use a steel portal frame construction, clad in non-reflective dark green cladding and sheeting panels, with a hipped roof on the southern side — design choices that planning documents describe as intended to minimise the visual impact of such a large structure within its rural, wooded surroundings. Out front, plans include a themed entrance portal standing around five metres tall, along with a new plaza area to be built in front of the building itself — the kind of guest-facing space typically used for queue management, photo opportunities, and simply making an attraction feel like a proper "front door" rather than a warehouse with a ride inside it.

Is It Definitely a Roller Coaster? Here's where things get genuinely interesting from a "what might this actually be" perspective. While most of the submitted planning documents refer fairly generically to "an indoor attraction," the application's Transport Statement — a document primarily concerned with traffic and access impact rather than ride design — reportedly makes specific reference to the introduction of a roller coaster. That's about as close to an official confirmation of ride type as currently exists, and it's the primary reason fans have moved from "maybe a dark ride" to "almost certainly some kind of coaster" in their speculation. What kind of coaster, though, is a genuinely open question, and the building's own physical constraints rule quite a lot out. Planning documents indicate significant excavation below ground level has effectively been ruled out for the site, which caps the maximum feasible drop height of any track at little more than around 50 feet. That's a meaningful limitation — it rules out the kind of towering first drop you'd associate with a hypercoaster, and points instead toward something more compact and manoeuvre-focused, likely relying on tight turns, inversions or launch mechanisms within a relatively contained footprint rather than sheer height and speed. Some fan speculation has pointed toward Rocky Mountain Construction's compact "Wild Moose" family coaster concept as a design that might plausibly fit the available floorspace, though it's worth being clear this is informed guesswork from enthusiasts studying the building dimensions, not anything approaching an official confirmation from Merlin or Alton Towers. Whatever it eventually turns out to be, the physical building alone tells us it's designed to be an experience built around indoor theming and ride choreography rather than raw height and speed — closer in spirit to an indoor dark-ride-coaster hybrid than to something like Galactica or The Smiler.

The "Secret Weapon 9" Theory If you spend any time in Alton Towers fan circles, you'll eventually run into references to "SW9" in connection with Project Horizon, and it's worth explaining where that comes from, because it's a genuinely long-running naming tradition at the resort. For years, Alton Towers has used internal "Secret Weapon" project codenames for its major new coaster investments, with Wicker Man — the park's wooden coaster that opened in 2018 — having carried the internal designation Secret Weapon 8, or SW8. Given that pattern, fan speculation naturally jumped to whether Project Horizon might represent Secret Weapon 9. That theory picked up genuine credibility when John Wardley — the legendary, semi-retired ride designer behind some of Alton Towers' most beloved coasters, including Nemesis and Oblivion — reportedly referenced SW9 directly at a public event, while also praising new roller coaster technology he described as being developed for the park. It's not an official confirmation from Merlin themselves, but coming from someone with Wardley's credibility and history with the resort, it's about as strong a piece of secondhand evidence as this kind of speculation ever gets — and it's exactly the sort of claim worth flagging clearly as fan-sourced rather than treating as confirmed fact.

Why Has Project Horizon Stalled? This is the part of the story that's genuinely uncomfortable to write about honestly, but it's also the most important part for understanding where things actually stand — and it's exactly the kind of thing an independent site like this one can say plainly where official channels won't. Despite planning permission being secured back in February 2023, construction on Project Horizon has not meaningfully progressed in the years since. The most credible explanation circulating among industry commentators isn't creative or logistical — it's financial. Merlin Entertainments, Alton Towers' parent company, has faced real cash-flow pressures in recent years, including credit rating downgrades driven by concerns that its level of capital expenditure was unsustainable relative to its debt position. In plain terms: building expensive new rides costs a huge amount of money upfront, and Merlin's lenders have not been comfortable with the company continuing to spend at the rate it previously did. That's a meaningfully different situation to a project being quietly cancelled or redesigned. Planning permission remains valid, the site remains earmarked for the attraction, and nothing has been said to suggest Project Horizon has been abandoned outright. But a fully-approved planning application sitting untouched for years, on a site that's stood as a maintenance yard for over three decades already, is a strong signal that this is a project waiting on the company's broader financial position to improve rather than one being actively worked toward on any confirmed construction timeline. Later assessments have suggested the earliest realistic opening window has slipped well beyond the original ambitions — from an initially hoped-for 2025 opening, pushed back further, with the most recent credible estimates pointing toward, at the very earliest, sometime in 2027, and even that framed with considerable uncertainty about the project's current status. This is worth treating as a moving target rather than a fixed date, given how much this timeline has already shifted since the original 2022 announcement.

What This Means for Planning Your Visit If you're reading this hoping for a "should I wait to visit until Project Horizon opens" answer, the honest advice is: don't build a visit around it. Given the project's history of delay, an uncertain funding position, and no confirmed construction start date, there's no reliable way to predict when — or definitively whether — this attraction will actually open. Anyone holding off on a trip in anticipation of Project Horizon risks waiting for a long time indeed. The more useful way to think about it is as one interesting thread in the park's ongoing story rather than a reason to delay booking. Alton Towers remains a genuinely excellent day out on the strength of its existing line-up regardless of what does or doesn't eventually get built on the old Alton Mouse site, and treating speculative future attractions as a reason to postpone a trip is rarely a good use of your time or your annual leave.

How to Keep Track of Genuine Progress Because this is a slow-moving story with a track record of long silent stretches followed by sudden bursts of activity, it's worth knowing what actually constitutes meaningful news versus what's simply renewed speculation. Genuine progress markers to watch for include: fresh planning submissions or amendments filed with Staffordshire Moorlands District Council (a strong signal that active design work is underway again), visible construction activity or hoarding appearing around the Coaster Corner site itself, official statements from Merlin Entertainments in investor communications or annual reports referencing capital expenditure plans for Alton Towers specifically, and any direct confirmation from the park of a ride name, theme, or opening season. Conversely, treat isolated forum speculation, uncredited "insider" claims, or recycled older articles being reshared as new with appropriate scepticism — this is a story that's attracted a lot of hopeful rumour over the years precisely because so little concrete information has been released.

A Pattern Worth Understanding Project Horizon isn't really an isolated oddity — it's a useful lens for understanding how Alton Towers' development process works more broadly, and it's a pattern worth bearing in mind whenever you hear about the next big rumoured addition to the park. Planning permission and financial reality are two entirely separate hurdles, and clearing the first doesn't guarantee the second follows quickly, or at all, on any predictable schedule. Major UK theme park investment is heavily dependent on the wider financial health of the parent company, not purely on demand or ambition at park level, and Merlin's broader financial position genuinely does shape what actually gets built and when — arguably more than any single creative decision does. For visitors, the practical lesson is simple: enjoy the park for what it currently offers, keep half an eye on genuine planning and construction developments if you're interested in the story, and don't let an unbuilt attraction with a genuinely uncertain timeline shape your travel plans.

Quick Reference Summary Project name: Project Horizon (also speculated by fans to be internally designated Secret Weapon 9, or SW9) Location: The former Alton Mouse roller coaster site, an area known as "Coaster Corner," between The World of David Walliams and the (former) Alton Towers Dungeon Announced: September 2022, via public consultation with local residents Full planning application submitted: Early October 2022 Planning permission approved: 16th February 2023, by Staffordshire Moorlands District Council Estimated cost: Approximately £12.5 million Building dimensions: Roughly 71m long x 46m wide x 19.4m tall, with a smaller ~40m x 10m entrance room and a 5m entrance portal Ride type: Confirmed as an indoor attraction; a roller coaster is referenced specifically in the application's Transport Statement, though the exact ride design remains unconfirmed Key design constraint: Limited underground excavation caps the maximum feasible drop height at roughly 50 feet, ruling out an extreme-height concept Reason for delay: Widely attributed to Merlin Entertainments' broader financial pressures and capital expenditure constraints, rather than any change to the planning approval itself Estimated opening: Originally hoped for as early as 2025; more recent estimates suggest, at the earliest, 2027 — treat this as uncertain and subject to further change Best advice for visitors: Don't delay a trip in anticipation of this attraction opening; treat it as a long-term story to follow rather than a factor in near-term visit planning