The Avengers - "Face Off" trailer with Thor & Iron Man

I like the dialogue, as only Robert Downey Jr can deliver:

Loki: I have an army

Tony Stark/Iron Man: We've got a Hulk

From the YouTube page: Marvel Studios presents in association with Paramount Pictures "Marvel's The Avengers" -- the Super Hero team up of a lifetime, featuring iconic Marvel Super Heroes Iron Man, The Incredible Hulk, Thor, Captain America, Hawkeye and Black Widow.

When an unexpected enemy emerges that threatens global safety and security, Nick Fury, Director of the international peacekeeping agency known as S.H.I.E.L.D., finds himself in need of a team to pull the world back from the brink of disaster. Spanning the globe, a daring recruitment effort begins.

Starring Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner and Samuel L. Jackson, and directed by Joss Whedon, "Marvel's The Avengers" is based on the ever-popular Marvel comic book series "The Avengers," first published in 1963 and a comics institution ever since.

Opens May 4th.