Marvel Studios' Kevin Feige recently explained how Avengers: Doomsday will star at least five superhero teams, including the one in Thunderbolts*, which should help to cement it as one of the MCU's biggest movies. This was a confirmation of what many suspected when Marvel Studios' surprise live stream revealed a cavalcade of confirmed cast members whose Marvel movie characters are typically part of distinct teams, except for one notable cohort. The five-hour-long stream shook the MCU fandom to its core as it revealed such returning actors as Alan Cumming, who hasn't starred in a Marvel movie since 2003's X2.