First Potential Look at Rebecca Romijn as Mystique in Marvel’s Avengers: Doomsday Revealed

(FYI: This post contains potential spoilers for Marvel’s Avengers: Doomsday.)

The first potential look at Rebecca Romijn as Mystique from the X-Men in Marvel’s Avengers: Doomsday has reportedly leaked online. See the image below.

A leaked image reveals Rebecca Romijn’s Mystique in Avengers: Doomsday, wearing a blue and white tactical X-Men suit with a gold “X” belt.

In the image, Mystique is seen wearing a blue and white tactical-style X-Men suit — a form-fitting bodysuit featuring a deep blue base with white armored panels across the chest, shoulders, arms, and legs, complemented by a gold utility belt with an “X” insignia buckle.

In an interview with Entertainment Tonight, Romijn opened up about returning as Mystique in Avengers: Doomsday. She said, “It’s been incredibly fun, surreal, and wonderful to be back with my old cast as well as the new cast.”

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During production, Romijn said it felt very surreal returning as Mystique in Avengers: Doomsday. “It feels great. We’re currently in production. I’ve been going back and forth between Star Trek and Doomsday, so it’s been a very eventful summer.”

According to reports, the first trailer for Avengers: Doomsday will be released next month and shown exclusively in theaters during Avatar: Fire and Ash. It is also expected that the second phase of the “chair reveal” is planned for December 18, 2025.

Directed by the Russo brothers from a screenplay by their longtime collaborator Stephen McFeely and Michael Waldron. The film features cinematography by Newton Thomas Sigel (Bohemian Rhapsody, X-Men: Days of Future Past) and production design by Kasra Farahani.

Here’s the plot synopsis for Avengers: Doomsday, revealed by Disney China:

“Doctor Doom has officially arrived on the Marvel Cinematic Universe stage. This villain, a master of cutting-edge science and powerful magic, will unleash a cascading crisis across the multiverse. Marvel’s most iconic actor, Robert Downey Jr., also returns as Doctor Doom!”

Announced Cast for Avengers: Doomsday

Robert Downey Jr. as Doctor Doom
Paul Rudd as Ant-Man
Simu Liu as Shang-Chi
Tom Hiddleston as Loki
Florence Pugh as Yelena Belova
Danny Ramirez as Falcon
Sebastian Stan as Bucky Barnes
Winston Duke as M’Baku
Chris Hemsworth as Thor
Letitia Wright as Black Panther
Tenoch Huerta Mejía as Namor
Anthony Mackie as Captain America
David Harbour as Red Guardian
Wyatt Russell as U.S. Agent
Hannah John-Kamen as Ghost
Lewis Pullman as Sentry

X-Men cast:

Ian McKellen as Magneto
Patrick Stewart as Professor X
Rebecca Romijn as Mystique
James Marsden as Cyclops
Kelsey Grammer as Beast
Alan Cumming as Nightcrawler
Channing Tatum as Gambit

Fantastic Four cast:

Pedro Pascal as Reed Richards (Mr. Fantastic)
Vanessa Kirby as Sue Storm (Invisible Woman)
Joseph Quinn as Johnny Storm (Human Torch)
Ebon Moss-Bachrach as Ben Grimm (The Thing)

Produced by Kevin Feige, Louis D’Esposito, and Russo Brothers will produce through their AGBO banner.

Avengers: Doomsday will be released in theaters and IMAX across the United States on December 18, 2026, and Avengers: Secret Wars is scheduled for release on December 17, 2027.