I think portraying him like his character in Earth's Mightiest Heros would go a long way towards him being a favorite with the GA.
He does quite a bit of speaking (both in third person and broken English), is rather funny and is definitely a powerhouse.
Sounds like a natural evolution to me...
I just worry about the looks of HULK more than anything. HULK 03, too big a head, and got too tall. TIH, was a little too vascular and not quite thick enough.
If he looks like the concept art and in the 8-9' range, we should be good! Not too big a head, head proportion was good in TIH, but better skin texture, which looked to be better in the trailer. And of course he has to have thick, beyond human musculatur; big hands and feet, and the short nose, and big jaw like TIH.
Dale Keown is my favorite HULK artist to date... His bud Marc Silvestri is doing pretty darn good as well.
Plot in the Avengers: of course he should get into it with Thor, and I agree it should be Thor scoffing at the idea of HULK (given they've never met) and Thor is impressed by the big green guy. Perhaps a little comedic and brought under control by someone HULK identifies with.
HULK has to take mop up duty, otherwise, what good does all that strength do? Perhaps it looks as though Loki's cohorts have HULK overwhelmed, then he does some monolithic feat of strength before coming to the aid of the rest! (Perhaps this could also be the moment that captures the attention of the great Warmongerer; Thanos for The Avengers 2)
I've wanted to see Thanos with the Infinity Gauntlet vs. the Avengers since MARVEL Super Heroes on the original Nintendo! LOL!