The trailer, which was shown twice, was already given the post production 3D treatment; and it was very well done. Asgard was magnificent, better than I could ever have expected it. Thor's banishment scene (where that image of Odin's throne room comes from) was very emotional; Hopkins owns the role of the All-Father.
The trailer opens to Thor in Agent Coulson's custody. During Coulson's interrogation, flashback montage of Thor kicking the crap out every S.H.I.E.L.D. agent in the facility built around the fallen Mjolnir. The rest, you'll have to listen to...
... pay attention to the end, it's when the Destroyer armor (which is empty) takes on Agent Coulson and his S.H.I.E.L.D. agents.