The word is out that Robot Chicken will be giving the full treatment to Avatar and Twilight, as it did for Star Wars. They have done the first handful of episodes for season 5 and are continuing with production. Seth Green estimates 10 months until we get to see it on TV, but in the meantime season 4 is on the store shelves.
And then there is Fallout, a BBC funded project based on the Dark Horse Comics series Apocalypse Nerd. You can never have too much British End of the World comedy, after all. Right now it is only a pilot but with luck the BBC will pick it up for a full series. Thanks to SF Signal for the heads up on this one.