Anybody else had a chance to see this yet? I'm pretty much floored with how well this was put together. The animation is very crisp and the voices all seem to work well. I don't read anything in Marvel's Ultimate line, so I wasn't expecting a few of the differences from the main Avengers title, but from Cap to Iron Man to the Hulk, everybody was very true to their characters.
Also to show that Marvel and Lion's Gate are expecting big things out of this production, the liner gives dates for Ultimate Avengers II, Iron Man and Doctor Strange. The preview for UA II shows that they're going to introduce least one additional Avenger, and it's one of my other favorites, so I'm a happy camper.
Here (lost.cubit.net) are some screenshots of the smoke. Picture #9 is most interesting. I first thought it might be souls inside the smoke, but having seen that, I've revised that theory. This was an amazing episode. Eko is awesome!