Rumors are swirling that Oscar Isaac might be reprising his role as Moon Knight in the highly anticipated film, Avengers: Doomsday. While this news comes as a surprise to many fans, recent developments have given the theory some credence.
Over the weekend, the official social media for Star Wars Celebration announced that Isaac would no longer be attending the event in Japan this year due to changes in his production schedule. This announcement, made back in February, had initially sparked excitement about a possible return of Poe Dameron to the Star Wars universe, especially following Daisy Ridley's announcement at Star Wars Celebration 2023 about her involvement in a new film. However, Isaac's sudden schedule change has led fans to speculate about his involvement in Avengers: Doomsday, which is currently being filmed in London.
Social media platforms were quick to react to the news:
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 the theory remains speculative, it's important to note that Isaac was not included in the initial cast reveal for Avengers: Doomsday. However, Marvel Studios producer Kevin Feige hinted at CinemaCon that the livestream did not reveal the entire cast, stating, "We revealed many, not all." This leaves room for the possibility of Isaac's involvement.
Isaac previously starred in the six-episode season of Moon Knight released in 2022, but no follow-up has been announced yet. Avengers: Doomsday is slated to premiere on May 1, 2026, featuring a host of returning heroes and new faces, as highlighted during the epic livestream.
In other MCU news, fans have been buzzing about Robert Downey Jr.'s recent Doctor Doom-themed invitation for his 60th birthday party, further fueling speculation and excitement around the Marvel universe.
Last month's cast reveal for Avengers: Doomsday was particularly notable for its inclusion of veteran X-Men actors. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all confirmed to appear in the film, signaling a significant presence of the X-Men. Grammer, who played Beast in the Fox X-Men franchise, made his MCU debut in The Marvels' post-credits scene. Stewart, known for his role as Charles Xavier/Professor X, had a brief appearance in the MCU via Doctor Strange in the Multiverse of Madness. Meanwhile, McKellen, Cumming, Romijn, and Marsden are yet to make their MCU debuts. This heavy X-Men presence raises an intriguing question: Could Avengers: Doomsday be setting the stage for an epic Avengers vs. X-Men showdown?