But exactly what the plot of that movie actually is is anybody's guess. We know that it will include the return of Robert Downey Jr., now playing Doctor Doom, but an intriguing theory suggests how a potentially returning Chris Evans and Captain America may factor in, and how it will actually all tie into Avengers: Endgame.

Marvel's Superior Avengers series is the blueprint for how Chris Evans can make his MCU return as Captain America in Avengers: Doomsday.

Apparently Evans spoiled Anthony Mackie's promotion through some very MCU theatrics, part of which had convinced Mackie that a new version of Endgame's script he hadn't read was going to kill off Sam Wilson. As you'll read in this anecdote recalled below, that couldn't have been further from the truth:

Chris Evans recently dropped a bombshell during a casual conversation, accidentally spilling the beans on Anthony Mackie’s new role as Captain America in upcoming hit.on January 17, during

Avengers: Doomsday has taken an intriguing turn with Chris Evans joining Robert Downey Jr. in the cast. While Downey Jr.’s role as Doctor Doom was revealed at San Diego Comic-Con, Evans’ character remains a mystery,

One theory surrounding Endgame's ending could ensure Chris Evans' survival in the events of Avengers: Doomsday.