I was writing a script treatment for the ultimate new theatrical Muppet film, until JHC sold em' to Disney.
It'd begin in San Francisco, with the Muppets all working at some new startup dot com telecommunications company. Penguins, chickens amok, total classic Muppet mayhem for the first 7 or 8 minutes...except inside of a laid back, fun filled technology firm.(Beaker trying to help people with textsupport, and his head exploding from too many calls, Pepe trying to hit on females calling in for text support, Rizzo ordering pizza, just total crazyness.
But then, an evil corporate CEO, say...played by someone like Christopher Walken would shut em down. The main villain would be surrounded by Skeksis/creature shop like creatures, in the top of a corporate highrise...where the top floor is like this swampy dark crystal like netherworld.
Kermit, whose doing some deep life/soul searching/meditation away from everything in the swamp, gets a letter that his Muppet friends are in dire danger. So he literally crosses the four corners of the globe to gather all the Muppets...youd see brief scenes of him walking through deserts, snow storms, etc. He'd be in tokyo, Germany, the UK, Africa, middle east, etc trying to gather up old and new Muppets, even obscure ones.
Then theyd all face down the main villian, ala the final act of Roger Rabbit.
That's about as far as I got, but I think it's about as good as any idea the Muppet writers could mull around. **** have Spike Jonze direct it, have some whacked out unexpected cameos and really offbeat humor, and it'd be a hit with the hip kids.