Hold onto your capes, Marvel fans, because there's buzz in the air that Oscar Isaac might be reprising his role as Moon Knight in the upcoming blockbuster, Avengers: Doomsday. This speculation kicked into high gear over the weekend when Star Wars Celebration announced that Isaac would no longer be attending their event in Japan due to changes in his production schedule.
Back in February, the announcement of Isaac's appearance at Star Wars Celebration had fans buzzing with speculation about a potential return as Poe Dameron in a new Star Wars film, following Daisy Ridley's announcement at the 2023 event. However, with Avengers: Doomsday currently filming in London, fans are now piecing together the puzzle, wondering if Isaac's schedule change hints at his involvement in the Marvel epic.
Social media erupted with excitement and speculation, with fans like James Young (@YoungJames34), G the Gamer (@G_daGamer), and Taco John (@SWaddict) all hinting at the possibility of Isaac joining the Avengers: Doomsday cast.
While this remains a theory, it's worth noting that Marvel Studios producer Kevin Feige mentioned at CinemaCon that the livestream reveal of the Doomsday cast was not exhaustive. "We revealed many, not all," Feige stated, fueling the fire of speculation. Isaac starred in the 2022 six-episode Moon Knight series, but no sequel has been announced yet.
Avengers: Doomsday is slated to premiere on May 1, 2026, promising a lineup of returning heroes and new faces. Meanwhile, MCU fans have also been intrigued by Robert Downey Jr.'s recent Doctor Doom-themed birthday invitation, adding another layer of mystery to the Marvel universe.
The Avengers: Doomsday cast reveal last month included a strong presence of veteran X-Men actors, such as Kelsey Grammer (Beast), Patrick Stewart (Professor X), Ian McKellen (Magneto), Alan Cumming (Nightcrawler), Rebecca Romijn (Mystique), and James Marsden (Cyclops). This heavy inclusion of X-Men characters has led fans to wonder if Avengers: Doomsday might secretly be an Avengers vs. X-Men film. With Grammer and Stewart already having made brief MCU appearances, the stage is set for an epic showdown.
