Hmm... I don't know much about that. I know he mentioned two roles that he had a bit of interest in:
Billy Flynn, which I think might be interesting and not totally disastrous, and Leo Bloom, which... I'd go see, but I'd probably have to do a lot of laughing... laughing AT, not WITH, unfortunately. Man can't dance. I don't know what he was thinking when he said that. Well, dancing would be an issue with Billy, too, I guess... but I think that's the kind of dancing that he could get past, like he did in Cabaret. I don't think he has the comedic chops for Leo, either, but he has the charisma for Billy.
I'm not sure if there's anything else I could see him playing.... if Hedwig ever comes back... gah. Or RHS, for that matter. He used to say he wanted to play Frankenfurter (sp?).
A work of art is an invitation to love.