Oscar Isaac Exits Star Wars Event, MCU Fans Speculate Moon Knight in Avengers: Doomsday

Hold onto your hats, Marvel fans! Rumors are swirling that Oscar Isaac might be reprising his role as Moon Knight in the upcoming blockbuster, Avengers: Doomsday. This surprising speculation gained traction following a recent announcement from Star Wars Celebration that Isaac would no longer be attending their event in Japan due to changes in his production schedule.

Back in February, the news of Isaac's planned appearance at Star Wars Celebration had fans buzzing with excitement, hoping for news about Poe Dameron's return. Daisy Ridley's announcement of her role in a new Star Wars film at the 2023 Celebration set the precedent, so it's no wonder fans were curious about Isaac's potential announcement.

While the specifics of Isaac's new production schedule remain under wraps, the fact that Avengers: Doomsday is currently being filmed in London has fueled speculation about Moon Knight joining the Avengers. Social media has been abuzz with fans piecing together the clues:

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

However, it's important to remember that this is still just a theory. Although Isaac's name wasn't included in the initial Avengers: Doomsday cast reveal, Marvel Studios producer Kevin Feige hinted that not all cast members were announced. "We revealed many, not all," Feige said during a video call at CinemaCon, leaving room for surprises.

Isaac's portrayal of Moon Knight in the 2022 six-episode series was a hit, but Marvel has yet to confirm a second season. Avengers: Doomsday is slated for a theatrical release on May 1, 2026, promising an ensemble of returning heroes and new faces, as showcased in the epic livestream.

In other Marvel news, fans are also speculating about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation. Could this hint at a larger role in the MCU's future?

Last month's Avengers: Doomsday cast reveal was dominated by veteran X-Men actors, including Kelsey Grammer as Beast, Patrick Stewart as Charles Xavier, Ian McKellen as Magneto, Alan Cumming as Nightcrawler, Rebecca Romijn as Mystique, and James Marsden as Cyclops. This has led fans to ponder whether Avengers: Doomsday might secretly be an Avengers vs. X-Men movie. The inclusion of these iconic characters certainly suggests a significant X-Men presence in the film.