Avengers: Earth's Mightiest Heroes.

Marvel announced on their site yesterday that they have an Avengers animated series currently in production. It will hit the public in 2011. They've got a full plate of upcoming animated shows, including the Iron Man show and Wolverine and the X-Men. This one looks like it's really geared toward kids with the style of animation, so if I remember to watch it in 2011, I'll probably sample a couple of episodes before I make a decision.