Farscape. Yes, I know the story ended with Farscape: The Peacekeeper Wars, but seeing interstellar badasses John Chrichton and Aeryn Sun continue to match wits with the likes of Scorpius would be nice.
Babylon 5 is a lost cause because J. Michael Straczynski completely jumped the shark with both Babylon 5: Legend of the Rangers and Babylon 5: The Lost Tales. Those two abominations have turned me off to the idea of watching anything new from that universe. Crusade was shit too.
I'd like to see more Lexx. That show was twisted and demented and simultaneously both utterly stupid and brilliant. And it had boobies.