Avengers: Doomsday could end up being oversaturated as an increasing number of characters are rumored to appear.

The second actor of the Avengers’ “Core Four” is returning, but almost certainly not as Steve Rogers/Captain America. At least, not the Captain America of the Sacred Timeline/Earth-616.

Avengers: Endgame directors Joe and Anthony ... and is expected to play a part in The Fantastic Four: First Steps. After all, Doctor Doom is the arch-nemesis of Mister Fantastic.