Lee Pace and Chris Evans shared the stage for a panel at Chicago's Comic Con this weekend, as they're each Marvel superstars and all, although they have yet to share the screen - Lee's reprising his Guardians role in Captain Marvel though I believe, so who knows?
These are comic books after all. Maybe the next Avengers movie will end with Cap sailing off into the stars in the big beefy purple-black arms of Ronan the Accuser. Anyway you can read more at this link, if these pictures aren't enough. (The pictures are enough.)