I think I read somewhere The Avengers was at first going to be told through Caps eyes like in the comics.....but Iron Man was just so much of a hit they decided to keep it open. Tony and Cap are the Alphas. Bruce is really NOT trying to do much at all by personality and Thor is an Alpha Alien that flies off every once in a while on his own. Aside from Jane dude really is disassociated from Earthlings on a base level. Im actually now glad they went with Scott Lang instead of original Hank Pym. It would have been too many Alphas. OG Hank Pym is pretty much Banner with more drive and purpose.