I've not seen it, but since it was sucessful I expect any number of like minded musicals. (Actually, I think this started when The Producers was a hit)

I think Princess Bride could be very well suited to become a musical. Particularly if they work off the movie, it's got the right feel. It could go that way easily.

I keep expecting a stage musical of Willy WOnka and the Chocolate Factory to be honest. I can't imagine why no one's thought of that one.