The upcoming Avengers: Doomsday and Secret Wars may have some of these conflicts.
The shared history between Iron Man and Dr. Doom is explained
Robert Downey Jr. surprised the world when he returned to the MCU as Doctor Victor Von Doom. Announced at this year's Comic-Con, the Iron Man star revealed himself as the antagonist of Avengers: Doomsday and Secret Wars. Downey Jr. previously played Iron Man in the MCU and ended his tenure in 2019's Avengers: Endgame.
Victor Von Doom is one of the most powerful villains in the Marvel Universe. The Emperor of Latveria has feuded with several heroes in the comics, in addition to being the main enemy of the Fantastic Four. While Downey Jr. gearing up to fight heroes he once fought alongside, here are four heroes from Avengers: Endgame who have defeated Doom in the comics.
The late Chadwick Boseman's King T'Challa was part of Team Iron Man in Captain America: Civil War, fighting alongside Robert Downey Jr. in the film as well as in Endgame. In the comics, Black Panther once defeated Doctor Doom after the latter saw Wakanda's abundance of vibranium.
