Over on the Muppet Wiki, I found
the entry for Stephen Sondheim, and saw this little nugget: "His show, Into the Woods, was optioned by the Jim Henson company, but never came to fruition."
Oh MAN, can you just imagine? I'm sure they would have created new Muppets for it, but I couldn't resist the Muppet Game:
Kermit and Piggy as the Baker and his Wife
Robin as Jack and Fozzie as his mother.
That cow from Sesame Street as Milky-White
Janice as Cinderella.
Link Hogthrob as Cinderella's Prince and Bobo the Bear as Rapunzel's Prince (Just the idea of those two singing "Agony" is awesome).
Beaker as the Prince's Servant
Pepe the King Prawn as Little Red Ridinghood, (I'm going to see my grandmother okay)
Prarie Dawn as Rapunzel
Human Guest Star as the Witch