This does mean that you have to see the movie in 3D, as the Captain America five-minute teaser section will only be attached to Thor 3D screenings. So see Alan Taylor's textured world and get a peek at Cap's.
Disney still trying to make there be a difference between the "first" and the "mighty" Avengers happen:
“After Marvel’s The Avengers, the Marvel films are more interwoven than ever, and this pairing is the perfect complement to both of the new movies,” said Dave Hollis, executive vice president, theatrical distribution, at Walt Disney Studios. “Thor: The Dark World is going to be an exceptional theatergoing experience, and this sneak peek will really rev fans up for the return of not only the Mighty Avenger but the First Avenger as well.”
Get your tickets now! This is the most Cap you get to see until April!