io9 posted a bit from a scrapped Wizard of Id TV pilot created by Jim Henson in 1969. Here it is:

I'm glad Henson went his own way; The Muppet Show's show-within-a-show format really broadened the possibilities of the sketches in a way that Id simply couldn't. I think this show would have been really funny for a little while and then, unless Henson inserted more and more of his own creations, it would have died a quiet death. Still, I'm glad this video surfaced; it's fun to watch this and wonder what might have been.

(Related: Wizard of Id is still being published. That's insane.)