After being let down by those direct to DVD features I can safely say that I'm just about done with Futurama. I really don't know what happened to the writing staff but I just got a sense of everyone buying into their own hype and churning out fan service for the sake of fan service which (IMHO) doesn't automatically translate into a quality product. Just let it end before it turns into Simpsons 2, where gross-out and butt jokes, a "look how nerdy and clever we are" attitude and a severe overuse of tertiary characters becomes more important than telling a consice, engrossing story.
Anyway, what show what I like to see come back? Darkwing Duck. But I know that's never going to happen so...probably Ed, Edd and Eddy.