Yeah. I haven't seen it up anywhere else yet...
I doubt the accuracy of at least some of that "leak". We already know per the end of Thor
that the Macguffin for Avengers is the Cosmic Cube, not the Infinity Gauntlet.
The bit about Red Skull could be true though, he has a history with the Cube after all.
BTW: I totally
geeked out at RDJ's line in the trailer: "If we can't save the world, we d*** sure are gonna avenge it!"
Way to go RDJ! Hope that line stays in.