Rumors are swirling that Oscar Isaac might reprise his role as Moon Knight in the upcoming blockbuster Avengers: Doomsday. This speculation gained traction after Star Wars Celebration announced that Isaac would no longer be attending the event in Japan due to changes in his production schedule. Initially, fans hoped for news of Poe Dameron's return to the Star Wars universe, especially after Daisy Ridley's announcement of her involvement in a new Star Wars film at the 2023 Celebration. However, the focus has shifted to Marvel's universe following this latest development.
With Avengers: Doomsday currently in production in London, fans quickly connected the dots, theorizing that Isaac's schedule change might be related to filming for the Avengers movie. Social media buzzed with excitement and speculation:
He’s gonna be filming doomsday?
— James Young (@YoungJames34) April 4, 2025
Dooooomsday
— G the Gamer (@G_da_Gamer) April 4, 2025
Doomsday
— Taco John (@SWaddict_) April 4, 2025
While these theories are intriguing, it's important to remember that they remain unconfirmed. Oscar Isaac's name was notably absent from the official cast list revealed for Avengers: Doomsday. However, Marvel Studios producer Kevin Feige hinted at more surprises, stating during a CinemaCon video call that the livestream did not include the entire cast: "We revealed many, not all."
Isaac previously starred in a single six-episode season of Moon Knight in 2022, and Marvel has yet to announce any plans for a follow-up series. Meanwhile, Avengers: Doomsday is set to premiere on May 1, 2026, featuring a lineup of returning heroes and notable new additions as showcased in the epic livestream.
In other Marvel news, fans have been buzzing about Robert Downey Jr.'s recent Doctor Doom-themed 60th birthday invitation, adding another layer of speculation to the mix.
The cast reveal for Avengers: Doomsday last month was particularly exciting, spotlighting several veteran X-Men actors. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all confirmed to appear, signaling a significant presence of the X-Men in the film. Grammer, who played Beast in the Fox X-Men franchise, debuted in the MCU through The Marvels' post-credits scene. Stewart, known for his role as Charles Xavier/Professor X, made a brief appearance in the MCU in Doctor Strange in the Multiverse of Madness as part of the Illuminati. Meanwhile, actors like McKellen (Magneto), Cumming (Nightcrawler), Romijn (Mystique), and Marsden (Cyclops) are set to make their MCU debuts. This has led fans to ponder whether Avengers: Doomsday might secretly be an Avengers vs. X-Men movie.
