I feel like that's going to be a problem with every single stand-alone movie now that Avengers has happened, though. I already spent Thor 2 thinking, "there's a bunch of weird ALIENS invading England, don't you think Iron Man and Captain America or anyone would maybe wanna get involved instead of just thinking 'well, Thor will handle it'?" But I still agree, the entire second half of Cap 2 needed some Tony. I knew it wasn't going to happen, but it was still disappointing. (I was more irritated that we didn't even get a nod to the Avengers in the post-credits scenes. :/) It was still an immensely fun movie, but post-Avengers any stand-alone movie just doesn't make a lot of sense.