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

Rumors are swirling that Oscar Isaac might be reprising his role as Moon Knight in the upcoming blockbuster, Avengers: Doomsday. This speculation comes on the heels of a surprising announcement from Star Wars Celebration's official social media, which stated that Isaac would no longer be attending the convention in Japan due to changes in his production schedule. Initially, fans were buzzing with excitement over the possibility of Isaac returning as Poe Dameron in a new Star Wars project, especially after Daisy Ridley confirmed her return at the 2023 Star Wars Celebration.

The change in Isaac's schedule has led fans to speculate about his involvement in Avengers: Doomsday, which is currently filming in London. Social media erupted with comments like:

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 of Isaac joining Avengers: Doomsday is tantalizing, it's important to note that Marvel hasn't officially confirmed his involvement. Isaac's name was absent from the initial cast reveal for Doomsday. However, Marvel Studios producer Kevin Feige hinted at more surprises during a video call at CinemaCon, stating, "We revealed many, not all," leaving room for speculation.

Isaac previously starred in a single season of Moon Knight in 2022, and Marvel has yet to announce any plans for a follow-up. Avengers: Doomsday is slated for release on May 1, 2026, promising a grand ensemble of returning heroes and new faces, as highlighted in the epic livestream.

In other MCU news, fans have been buzzing about Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding another layer of intrigue to the ever-evolving Marvel universe.

Meanwhile, the cast reveal for Avengers: Doomsday last month featured a heavy emphasis on veteran X-Men actors, including Kelsey Grammer (Beast), Patrick Stewart (Charles Xavier/Professor X), Ian McKellen (Magneto), Alan Cumming (Nightcrawler), Rebecca Romijn (Mystique), and James Marsden (Cyclops). Grammer and Stewart have already made their MCU debuts, while the others are set to join the franchise with Doomsday. This significant inclusion of X-Men characters has led fans to wonder if Avengers: Doomsday could secretly be an Avengers vs. X-Men movie.