There's a fan theory that Stan Lee has been playing one character - perhaps even himself - in every single one of his movie cameos. If that idea sounds far-fetched, well, let's just say Marvel isn't shooting it down.
“Yes, we always thought it would be fun. Stan Lee clearly exists, you know, above and apart from the reality of all the films," Marvel Studios president Kevin Feige explained at a press junket (via ScreenRant). "So the notion that he could be sitting there on a cosmic pit stop during the jump gate sequence in [Guardians of the Galaxy Vol. 2] was something very fun – James had that idea and we shot that cameo and loved it so much, you know, you see it a couple of times in the movie. It wasn’t in for a long time and we put it back in towards the end of the process where he references that time he was a Federal Express agent – we thought it would be fun to put that in there because that really says, so wait a minute, he’s this same character who’s popped up in all these films."
While Feige doesn't explicitly say this, part of the theory is that Lee himself bridges the gap between 20th Century Fox, Sony, and Marvel's own cinematic universes. And, given the second Easter egg hiding in Lee's Guardians of the Galaxy Vol. 2 cameo (which we won't spoil here), Feige may have just given a handful of conspiratorially minded fans more fuel for their speculation.
Guardians of the Galaxy Vol. 2 is due out in theaters May 5.