MCU fans have taken to X/Twitter to put forward a theory about the Marvel star's return, as well as explaining why it's a bad idea.

This would give Evans a chance to do something new with a role he's been tied to since 2011, portraying a Steve similar to the one we all know and love, albeit with a magical twist that could even see him fulfil Doctor Strange's role from the comics as Doom's right-hand-man.

He was a cornerstone of the Marvel Cinematic Universe before retiring the role of Captain America with 'Avengers: Endgame.'