'The Avengers' Trailer Teaser: Partial Footage Posted With 'Captain America' (VIDEO)

It's not often that a film is nearly as notable for what happens during the credits as the two hours of action that precedes them, but when you're teasing the biggest superhero epic of all time, the excitement is justified.

A well-reviewed film and the current box office weekly champ in its own right, "Captain America" included a tease of the next chapter of the Marvel Comics movie universe, the massive hero ensemble flick, "The Avengers." Set for a 2012 release, the film, directed by "Buffy the Vampire Slayer" and "Firefly" creator Joss Whedon, brings together the legendary super group, many of whom have already had shining moments on the big screen.

In addition to Chris Evans's Captain America, the film will feature Chris Hemsworth's Thor, Robert Downey, Jr.'s Iron Man, Jeremy Renner's Hawkeye, Samuel L. Jackson's Nick Fury, Mark Ruffalo's Incredible Hulk and Scarlett Johansson's Black Widow. Currently filming in New Mexico, it will take into account previous big screen story lines for the appropriate heroes, and, in addition to creating its own massive adventure, will launch each independent property into either sequels or brand new franchises.

Known for his ability to capture an authentic female voice in scripts and mixing a strong emotional core with big action, Whedon spoke about striking that balance in a new interview with io9.com.

"Although there is a lot of angst and a lot of human drama — which are the reasons you go to the movie, but you're not supposed to talk about them in an action film," he teased, "there's also a lot of expression of this human drama through hitting each other in the face and blowing up cars, so I think everybody's going to win."

The studio should win, too. Both "Captain America" and "Thor" kicked off their film franchises this summer with box office-winning $65 million opening weekends, while last summer, "Iron Man 2," made $622 million worldwide, including a $128 million domestic first weekend. Put them all together, and the possibilities are endless.

In an interesting move, Marvel released a clip of the very end of "Captain America," and, attached to it, part of the teaser trailer that runs after the credits end. We're treated to new costumes, Thor's self-seriousness and Tony Stark's wise guy sarcasm, making for a brief but juicy tease to kick off a year-long marketing campaign.