'Avengers: Doomsday' first synopsis REVEALED

Marvel's 'Avengers: Doomsday' synopsis reveals Doctor Doom's arrival, wielding both science and magic, triggering a multiversal crisis. Robert Downey Jr. returns as Doctor Doom. The film, a successor to 'Infinity War' and 'Endgame', teases a massive superhero team-up with nods to the Avengers, Wakanda, X-Men, and Thunderbolts. 'Spider-Man: Brand New Day' may hold clues to the upcoming saga.