Avengers: Doomsday will be the biggest superhero team-up since Avengers: Endgame, so it's not surprising that the creative team behind the movie has difficulty keeping track of all the characters. Luckily for them, there is an ingenious system in place to help them — a set of baseball cards.
The Russo brothers, who are directing both Doomsday and the follow-up Avengers: Secret Wars, have recently talked about this inventive way of working out which actors are available. They already used it for their previous MCU movies.
