Yeah, Hulk basically has a cameo. The trailers rather shamelessly exploit his fame by including almost all of his scenes in them. I'll bet Hulk fans would be really disappointed.
These films need to get longer and the plot written a little better to accomidate that extra time. Like I said before, they need to forget that 75 minutes or less is ideal time for a future cable airing and just take the time to flesh everything out.
The next movie, if there is another, needs to have some sort of team of supervillians. That way, the fight scenes can be different than "Avengers vs. grunts" or "piling on one villian" or something.
FYI, a "Teen Avengers" title has been announced for a future DTV after IRON MAN and DR. STRANGE. I'm not sure if this'll be based on YOUNG AVENGERS or not, though.
It was a little awkward that Steve chose to make his feelings for Widow known at Pym's funeral, but they likely ran out of time and maybe it was one of those, "as something is lost, something else is gained" sort of things. Maybe Hank's death reminded Steve of how short life can be, and to enjoy it while it lasts (or when you get a second chance, like he did; as he said, he never expected to survive defusing that rocket in WW2 and for most of the two films, he all but regretted surviving). PG-13 as a rating has become a bit dubious as it is, as certain things make the cut while others do not. For instance, you can have fair profanity and some very graphic violence, but a bare breast and suddenly it's R. While this film was quite violent, some of it felt repetative because, again, you can only watch the same aliens get ripped to shreds so many times before it gets stale. I would have designed some "more super-Chitari" warriors just so the action could get interspliced with something new. Even in TURTLES IN TIME, eventually you fight another form of Foot Soldier than "Purple".
There is a sense of "I wish they'd have just picked an audience", but you could say that a lot about some movies that are PG-13 (and may have been R is uneditted). Just look at DAREDEVIL. They should have went all out and went with an R version, and it would have been a stronger film (I liked it though, but it was flawed).