It'll take a lot to screw this up: Iron Man, Captain America, The Hulk and a handful of other extremely cool heroes in uniform, all blowing things up together wonderfully. Watch this trailer in HD... now.
It'll be tough waiting until next year for this, but until then, I'll keep this incredible line by Iron Man in my head:
"Big man in a suit of armour. Take that away, and what are you? "Uhm, genius, billionaire, playboy, philanthropist..."
Other points of awesomeness:
Sammy Jackson's eyepatch Everything Tony Stark will say Thor looking out of place Lasers Car explosion chain reaction Advanced aircraft Captain America eating sushi off his shield [Apple]