By the time Marvel concluded its hours-long YouTube presentation of the full cast ofAvengers: Doomsday it had revealed 27 different names. One Robert Downey Jr. had already been announced back at Comic-Con in 2024. Some, like Chris Hemsworth and Anthony Mackie, were all but forgone conclusions; you arguably couldnt make anotherAvengers sequel without them.But then there were some other names maybe a third of the full roster revealed online and on social media today that were genuine out-of-left-field surprises. A lot of them were members of the Fox X-Men franchise, which is technically defunctfollowing Disneys acquisition of the 20th Century Fox studio. Maybe it wasnt thatshocking that Patrick Stewartwould appear in Doomsday, given that he already made one cameo in the MCU in 2022s Doctor Strange in the Multiverse of Madness. On the other hand, the names announced todayincluded at least one actor who hadnt appeared in an X-Men movie in over20years! A child who was bornthe year this person last played a Marvel superhero can legally consume alcohol now. That is wild.Here are thenine biggest surprises in the cast list forAvengers: Doomsday.Of course, there are some surprising omissions from the cast as well. (Where is Tom Holland? Spider-Man doesnt get to fight Doctor Doom? Doesno one but me recallThe Amazing Spider-Man#5???) But thats a subject for another day.The Most Surprising Members of the Avengers: Doomsday CastWe did not expect to see these stars returning for Marvels Avengers: Doomsday.READ MORE: The Fox X-Men Are Officially Coming to the MCUThe Full Cast of Avengers: DoomsdayHere is every actor announced for the next massive Marvel crossover movie.