The Avengers will bring together the super hero team of Marvel Comics characters for the first time ever, including Iron Man, Captain America, Thor, the Hulk, Nick Fury, Black Widow, Hawkeye and more, as they are forced to band together to battle the biggest foe they’ve ever faced.

[Spoiler - The villain will probably be Loki due to the fact that he appeared in Thor movie after credit scene. ]

It had been rumored before that Loki might appear in the Avengers and of course Loki is the villain that originally brought the Avengers together in the comic books so it makes sense, but this is the first official confirmation I am aware of that Loki would be in both Thor and Avengers.

The video below is an episode of the Avengers VS Loki in cartoon version.