Here’s What Happened to ‘Clayface,’ DC’s Halloween Body Horror Movie That Sounds Absolutely Unhinged

For anyone who blinked, the answer to what happened to ‘Clayface’ is a lot. The shape-shifting Batman villain, once treated as a curious footnote in any conversation about Gotham’s rogues, is now headlining the third feature in James Gunn’s rebooted DC Universe.

After multiple delays, a director change, and a long casting hunt, the movie is finally locked in for a theatrical release on October 23, 2026. And what has emerged is genuinely unexpected, a full blooded body horror story that has very little in common with the usual superhero blockbuster.

From Mike Flanagan’s Pitch to a Halloween Release Date

The road here started years before the cameras rolled. Filmmaker Mike Flanagan publicly expressed interest in a standalone Clayface film as far back as January 2021, drawing inspiration from a fan favorite portrayal of the character in ‘Batman: The Animated Series’. He pitched the idea to the newly formed DC Studios in March 2023, and the project was officially greenlit in December 2024 as part of the new DCU.

Although Flanagan wrote the script, he could not direct because of scheduling conflicts with his upcoming ‘Exorcist’ film and a ‘Carrie’ miniseries. James Watkins of ‘Speak No Evil’ took over directing duties in February 2025, and screenwriter Hossein Amini was tapped to do a rewrite a few months later.

Principal photography began on August 31, 2025, in Liverpool, England, under the working title ‘Corinthians’. Filming wrapped in early November of that year, having moved between Liverpool locations and the Warner Bros. Studios Leavesden soundstages.

The movie was originally scheduled for September 11, 2026, but Warner Bros. shifted it to October 23, 2026, to lean into the Halloween period. Studio leadership reportedly viewed it as an event horror release in the mold of recent genre tentpoles.

Tom Rhys Harries Leads the Clayface Cast

The hunt for an actor to play Matt Hagen became a story of its own. Tom Blyth, George MacKay, Jack O’Connell, and Leo Woodall were all in the running and read for the title role in early June 2025, but Gunn and Safran were not ready to make a decision and chose to widen the search.

Welsh actor Tom Rhys Harries was ultimately cast as Matt Hagen and Clayface on June 17, 2025. Naomi Ackie was cast as Dr. Caitlin Bates, the scientist who creates Clayface, while Max Minghella signed on as a Gotham City police detective who is dating her character.

Eddie Marsan joined the cast in an undisclosed role around the start of filming, and David Dencik came aboard in early 2026. When the teaser trailer dropped, Nancy Carroll and Joshua James were also revealed to be appearing in the film.

It is a notable lineup of British and prestige drama performers that aligns with the project’s tonal ambitions. The film is produced by Matt Reeves, Lynn Harris, James Gunn, and Peter Safran, with Michael E. Uslan among the executive producers.

The Body Horror Tone Behind the Clayface Movie

This is not a typical superhero film, and the creative team is not pretending otherwise. The project has been described as Cronenberg-esque, with specific comparisons drawn to David Cronenberg’s 1986 remake of ‘The Fly’. It is also being positioned as DC Studios’ first ever foray into the horror genre, the first DC branded horror movie since Wes Craven’s ‘Swamp Thing’ in 1982.

The teaser trailer was released on April 22, 2026, and shows Hagen in a hospital bed with a bloody, bandaged face after being attacked by a knife wielding assailant before he is injected with mysterious chemicals that grant him shapeshifting powers. In the trailer’s final moments, he completely wipes away his face while sitting in a bathtub.

James Gunn has spoken openly about the tonal swing, telling CBS Mornings that the film is a complete horror movie and that DC Studios does not want every project to feel the same. He has also praised the screenplay enthusiastically, saying the team turned in one of the best scripts they had read.

Co star Max Minghella has confirmed that the body horror element is not just marketing language, calling the script fantastic and acknowledging that the film really goes there. The early word out of CinemaCon described an experience that landed somewhere between psychological dread and outright queasiness.

How the Clayface Movie Fits Into James Gunn’s DC Universe

Despite the dark tone, this is very much a piece of the larger DCU puzzle. ‘Clayface’ is the third film in Chapter One titled Gods and Monsters, following ‘Superman’ and the upcoming ‘Supergirl’.

Matt Reeves is producing alongside Gunn, Safran, and Lynn Harris, which reflects how long the idea bounced around before landing in its current form. Reeves had at various points considered using Clayface as a villain in his ‘The Batman’ sequel or developing a solo project in the spirit of ‘The Penguin’.

Gunn has clarified that Watkins’ ‘Clayface’ exists outside Reeves’ Batman continuity but is part of the larger DCU, set before the events of Gunn’s ‘Superman’ and offering the first proper glimpse of the new DCU’s Gotham City. A set photo featuring ‘The Batman’ logo briefly stoked rumors of a crossover, which Gunn quickly shut down.

With horror veterans behind the camera, prestige casting in front of it, and a Halloween release date, what happened to ‘Clayface’ turns out to be fairly simple. It quietly became one of the most distinctive and risky bets in DC’s entire upcoming slate.