This is the first link I saw on Twitter:
Avengers Superbowl Promo!
Is it May yet?
Boy, am I glad I found this link first, because the next link was the official Marvel one and you had to be on Facebook to see it. I'll resist the urge to go into my rant on that subject LOL
The scene near the end with Loki and Tony? I about exploded from squee! My two favourite guys! Woot!
I'm SO EXCITED!!!