Actually, I'd love it if all the characters from Good Times with Weapons showed up, but yeah, Professor Chaos had to make an appearance. The Woodland Critters made the last episode for me.
Dude, that would be hardcore awesome. I so hope they do that. And I haven't seen the episode where the Critters first showed up. All I knew at the time was when they first appeared, my roomate absolutly lost it the second they said "Hey y'all."