Marvel Avengers Doomsday mystery deepens: Russo brothers’ tease and Doctor Strange doubts spark new Marvel Metaverse talk

Marvel Studios’ upcoming film Avengers: Doomsday is shaping up to be one of the most discussed movies in the Marvel Cinematic Universe. Set for release on December 18, 2026, the film will begin the conclusion of the Multiverse Saga. A recent cast reveal named 27 confirmed stars, but the absence of Benedict Cumberbatch’s Doctor Strange has kept fans speculating. At the same time, a cryptic tease from the Russo Brothers has added more uncertainty about what the film will deliver.

Marvel Avengers Doomsday cast: Cumberbatch responds to Doctor Strange speculation

Doctor Strange’s involvement has been unclear for months. Cumberbatch initially confirmed his role in the movie, then said script changes shifted his character to Avengers: Secret Wars. Later, he once again stated he would appear in Doomsday, telling Business Insider, “I am in that one.” However, his name was not part of Marvel’s official cast announcement.

Speaking with Omelete (via Avengers Updates on X), he addressed the speculation, saying:

“Who knows? Maybe they just didn’t have enough chairs.”

His comment has left fans questioning whether Marvel is holding back surprises for a second round of cast announcements before the film’s release.

Marvel Avengers Doomsday: Russo Brothers share cryptic teaser

Directors Joe and Anthony Russo, who previously helmed Avengers: Infinity War and Endgame, posted a blurry image on Instagram with the words “Doomsday Is Coming.” The tease has prompted speculation that it could be connected to Reed Richards’ chalkboard from The Fantastic Four: First Steps, where Pedro Pascal’s Richards was last seen working on advanced equations. That film ended with Robert Downey Jr.’s Doctor Doom appearing alongside Franklin Richards, setting up a storyline that could connect directly into Doomsday.

Some fans believe the teaser hints at a trailer release, while others expect it could signal another cast reveal. Actor Chris Evans has not been confirmed for the film, though speculation continues about his possible return as Steve Rogers. Ryan Reynolds also fueled rumors after teasing Avengers connections on social media.

Marvel Avengers Doomsday cast mystery

Filming for Avengers: Doomsday is underway, and more details are emerging. Channing Tatum is confirmed to reprise his role as Gambit after his cameo in Deadpool & Wolverine. He has teased a “big fight” with Doctor Doom, suggesting that the X-Men will have a significant part in the story.

With the New Avengers, classic Avengers, Fantastic Four, and X-Men all expected to appear, fans are waiting to see how Doctor Strange might fit into the larger narrative. Given his knowledge of multiverses and incursions, his role could connect the events of Doomsday to Avengers: Secret Wars in 2027.

Marvel Avengers Doomsday: What to expect next

Marvel has an untitled film scheduled for July 2027, between Doomsday and Secret Wars. If that turns out to be Doctor Strange 3, it could explain the character’s uncertain place in the storyline and bridge the gap between the two Avengers installments.

For now, Marvel has not confirmed whether Cumberbatch will appear in Avengers: Doomsday. Between the cast announcement, the Russo Brothers’ cryptic tease, and hints from returning actors, fans will continue to speculate until more official updates arrive.

Source: Marvel Studios livestream announcement, Business Insider, Omelete (via Avengers Updates on X), Russo Brothers Instagram