Probably a dumb question, but are we going to see Coulson make his return and say hi to the Avengers? Or are they gonna drag it out until Avengers 3?
As of now, nothing confirmed. Though it'll probably be revealed seeing as Hill works with Stark and she knows, might let it slip or something.
End credits scene:
Stark: Cap's dead Fury, we can't bring him back.
Fury: Since we've had aliens and shit descend on New York, we started using their technology, we needed weapons to fight back. When S.H.I.E.L.D was active, we did experiments with alien DNA, to see the effects it had on people. Some resisted, some died, and it even brought others back to life.
Stark: That's sick, you can't just do that. You can't just play God.
Fury: It worked, Stark.
Stark: What about the consequences, where is the line drawn, how do you decide on who to revive and who not to, you can't just...
[Coulson walks in]
Coulson: Mr Stark, we need to talk.
I really expect it to be something that happens right at the end and Fury is setting up/running S.W.O.R.D and Coulson is doing his shit.