I don't think there's anything that's stopping them. They win an award every year, and that sparks buzz. That buzz brought the characters back to a place they haven't been since VMX's lightning in bottle ratings at the very least. They always get at least several thousand, if not millions of hits with their videos. Puppets are rebuilt, characters are recast. It's time to take The Muppet Show to Youtube. Short skits based on old recurring sketches would be great. All they need to do is get together and do it. I don't think a TV special between now and the production of the next movie is that out of the question, but viral videos are more accessible and much more likely. The Muppets came back with the movie... they need to stay in the public eye until the next one.