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,

Rebecca Romijn is sharing an update on her return as Mystique in the highly-anticipated Avengers: Doomsday. At The Hollywood Reporter's San Diego Comic-Con suite, the Star Trek: Strange New Worlds star admitted that she wasn't sure if she's finished filming for the forthcoming Marvel film because the script isn't fully complete.