Johnny Depp as the MC would be the hottest thing to hit the screen since
Desperado.
As for a
Wicked movie, i definetly think by the time they get around to it, Idina and Kristin will have gotten too old to play the parts, ditto to Ewan McGregor (though, if he was cast as Fiyero, i would kill to play his Elphaba). At the beginning, they're only supposed to be 18 or 19, fresh to university life.
The publicity for
Wicked is already so great, i think they could bring two young, general unknowns into the parts of Galinda and Elphaba, and then have some older, seasoned professionals in the various supporting roles, like bringing Joel Grey back, even Judi Dench as Morrible.
"Umm...A1 is a steak sauce."