He'd be so pissed. He was only just coming to terms with the SHRA. The Skrull invasion's one thing--he's used to crap like that--but coming back and finding out they put Norman Osborne in charge? Osborne'd have to arrest him, and he'd have legal cause pretty soon, because I think Steve'd quickly start doing something about that.

And then Sharon's mind-control...and the idea that he almost had a child? That'd just traumatize him. And he'd probably keep tabs on Sharon for a while, trying to find a way to fix that crack in her psyche.

I think he'd also be pissed at what people've done to Tony, even if he's still mad at Tony, because it's one thing to be angry at a guy for behaving like an idiot, but it's another to turn an old friend--even an ex-friend--into a scapegoat.