If you watched Captain America : The First Avenger, you must've waited for the credits to end cuz that's just how the Marvel movies roll.
Given that, we know the Avengers Movie is coming around May 2012, which should feature previous movie heroes like Captain America, Thor, and Ironman although there were a couple others shown who still haven't managed to pick up their own budgets for their own movies.
Here are a couple of the screenshots and even a video of a battle scene shot in Ohio.

Captain America, the Pleaser c/o uproxx
UPDATE: An official trailer has finally been released. No more looking at those crappy made up trailers some people made online
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