I think this trailer for The A-Team movie is pretty much what an A-Team movie trailer ought to be: they’ve got the narration, hints of the theme song, the van, machine guns, and all four characters doing what they do.
Since the narration isn’t likely to be heard in the movie, it was a good idea to use it in the trailer. It’s interesting (well, a little interesting) what lines were changed. “Crack commando unit” is now “elite commando unit,” I guess because “crack” will produce giggles in theatre audiences. And “Soldiers of fortune” is now “soldiers for hire.”