Doomsday is officially in production, it turns out the script isn’t quite locked in. This latest update comes straight from Rebecca Romijn , who’s making her long-awaited return to the Marvel universe as Mystique in the highly anticipated 2026 film,

The actress reprises her past X-Men role as the shapeshifting mutant Mystique in the Marvel Cinematic Universe event film, which set up shop in the U.K. She also recently wrapped filming season 4 of Strange New Worlds in Toronto and will return to film season 5.

Romijn kept her lips sealed when asked if she's read the entire script, noting, "I cannot confirm nor deny that I have read the entire script." She also admitted she "can't say" who she's filmed scenes alongside, but it was a "surreal" experience shooting with some of her original X-Men co-stars with a new, blended cast.