Oscar Isaac Exits Star Wars Event, Sparks MCU Moon Knight Avengers Rumors

Hold onto your hats, Marvel fans, because whispers of Oscar Isaac reprising his role as Moon Knight in the upcoming Avengers: Doomsday are swirling around the internet. Surprised? You're not alone, but recent developments have given this theory some legs.

Over the weekend, the official social media for Star Wars Celebration announced that Isaac would no longer be attending the much-anticipated event in Japan due to changes in his production schedule. This announcement came as a shock, especially since Isaac's appearance was a major draw, sparking rumors of a possible return as Poe Dameron in the Star Wars universe. After all, Daisy Ridley used a similar platform to announce her return as Rey in a new film at Star Wars Celebration 2023, leaving fans wondering if Isaac had something similar up his sleeve.

While the specifics of Isaac's schedule changes remain under wraps, the fact that Avengers: Doomsday is currently filming in London has led many to speculate that Moon Knight might be joining the fray. Social media has been abuzz with fans connecting the dots:

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

Despite the excitement, it's important to remember that this is still just a theory. Marvel is known for its surprises, and while Isaac wasn't included in the initial Doomsday cast reveal, producer Kevin Feige hinted that not all cast members were announced. "We revealed many, not all," Feige stated during a CinemaCon video call, leaving the door open for more surprises.

Isaac's portrayal of Moon Knight in the 2022 six-episode series was well-received, yet Marvel has yet to confirm a follow-up. As for Avengers: Doomsday, the film is slated to premiere on May 1, 2026, promising a blockbuster lineup of returning heroes and new faces as showcased in the epic livestream.

Meanwhile, MCU enthusiasts are also buzzing about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding another layer of intrigue to the MCU's future.

Last month's Avengers: Doomsday cast reveal was packed with veteran X-Men actors. Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, and James Marsden are all set to appear, confirming the X-Men's significant role in the film. 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, briefly appeared in the MCU in Doctor Strange in the Multiverse of Madness as part of the Illuminati. Meanwhile, McKellen (Magneto), Cumming (Nightcrawler), Romijn (Mystique), and Marsden (Cyclops) are yet to make their MCU debut. This raises an intriguing question: is Avengers: Doomsday secretly an Avengers vs. X-Men movie?