7) Agent Coulson
OK, obviously Agent Phil Coulson isn’t an exclusively TV character like the others on this list, as it was his success in the movies that got him his own lead role in Agents of S.H.I.E.L.D. However, he does deserve to return to the movies for one pretty important reason.
Seeing as Coulson has never even been mentioned since his ‘death’ in The Avengers, we can assume that Earth’s Mightiest Heroes still think he did actually pop his clogs – when we all know that Fury had him brought back to life. This seems like something they ought to know, so perhaps Coulson could pop up for a quick cameo to explain the truth.
The upcoming two-part extravaganza Avengers: Infinity War promises to unite more characters than ever before. It’s already fan-baiting enough, so why not have Clark Gregg drop in just to quickly say “I’m not dead” before disappearing again?