As in, "AAAAAAAA! Shit! The Hulk is coming!" and "AAAAAAAA! What is Loki wearing!?" and "Holy crap, you guys, check out Scarlett Johansson's AAAAAAAASS!"
All kidding aside, these are pretty great images and certainly get me pumped to see grown men in fabulous tight-fitting costumes trade quips and punch each other. I particularly like Captain America's new outfit which feels very true to the classic comics.
Plus, as a hot-blooded, shallow, chauvinistic male (spell-check just said, "Are you sure you don't mean 'charismatic'?), I have to say that Scarlett looks pretty alluring in that pose. All that practice in the mirror was worth it!