For months there's been rumors that The Avengers: Earth's Mightiest Heroes was going to be canceled. This didn't make any sense since the show was so well received along along with the fact that the movie was so successful. The show did a lot to prepare audiences for the movie and was appearing to be a possible place to try out new ideas like Guardians of the Galaxy or Beta Ray Bill to gauge what audience reaction would be.
Sadly, Marvel released an official press release (according to Marvel TV News) stating the series would not be renewed for a third season.
What's the good news?
Marvel will replace EMH with their own new show, Avengers Assemble in 2013.
Why? What's the difference. I guess this new show would be completely produced and under Marvel's control. In many ways, that will be a good thing. It's just unfortunate that EMH has to go away.