I think that a Muppet version of the Wizard of Oz would be so awesome! I have so many ideas that I think would be so cool...
Here is the cast I think would be perfect for the roles:
-Miss Piggy: Dorothy
-Foofoo: Toto
-Kermit: The Scarecrow
-Fozzie: The Tinwoods-Bear
-Rowlf: The Cowardly Dog-Lion (they could make a reference to the real Doglion as a joke for fans)
-Gonzo: The Wicked Warlock of the West (with his evil flock of flying chickens)
-Camilla: Leader of the flying chickens
-Bunsen and Beaker: The Wizards of Oz (when they finally try take Dorothy home, they use anti-gravity pills to fly back, but Miss Piggy is too heavy and doesn't fly)
-Pops: Emerald City Doorman
-Scooter: Emerald City tour guide (constantly reminds the 4 main characters that his uncle owns the City and he tries to sell things to them)
-The Electric Mayhem (Janice, Dr. Teeth, Lips, Floyd, Zoot, Animal, and Zoot): Resident band of Emerald City (and they play an actual song with words after the warlock (Gonzo) is killed. Maybe the fast version of Rainbow Connection that was used in Kermit's Swamp Years.)
-Statler and Waldorf: Dorothy's neighbors who also get stuck in Oz. They don't travel with the group, but they make several appearences making fun of the Oz residents and places. (possibly left behind in Oz at the end of the movie)
-Robin, Rizzo, Pepe, Gaffer, Bean, Penquins, frogs, rats, small animals: Munchkins (because many of these characters are popular, they will appear several times in the movie)
-Sam the Eagle: Mayor of the righteous, moral, decent, patriotic Munchkin City.
-Sweetums, Thog, Doglion, and other monsters: Spooks in forest, and warlock's minions
-Sesame Street cameo: Cookie Monster - seen several times trying to find the pot of cookies at the end of the rainbow
-Emerald City Residents (many cameo appearences): Crazy Harry, Lew Zealand, Annie Sue, Link, Strangepork, Johnny, Sal, Beau, Clifford, Bobo, Spamela, Anything Muppets, and real humans.
-Human cast: Glinda, Aunt Em, Uncle Henry, other good witch (if they are doing the books version)
I think there should be some sort of a love story between Kermit and Miss Piggy
-maybe she loves the real Kermit at the begining and then the scarecrow of Oz
Most of the songs should be done by Muppets - it's more fun that way
At the end, instead of the four main characters going to defeat the warlock, all of the Muppets should go, for a big battle scene like in the GMC. In the end, when Gonzo melts, Beau should mop up the water. Then the Muppets should all go back to the Emerald City for a big celebration and Music from the Mayhem.
Miss Piggy and Gonzo can fight before the Oz trip about Foo foo chasing Gonzo's chickens
Those are my ideas, tell me what you think...