Little Shop didn't get to Broadway until over 20 years after it came out. TTB only premiered in 2001 Off-Broadway. My two cents...
-too intimate for a Broadway house
-no producer will find it financially worthwhile (yes, small running cost and Jonathan Larson's name, but that's it - look at what's on Broadway right now: movie musicals, not emotional musical autobiographies)
-why? Is New York DYING for a TTB revival?
I'm with COOOOLKID, make way for the new stuff. I love TTB, about to direct a production in Seattle, but it's had it's time, let another show play New York.
Eeeeeeyyyyyyyyaaaaaaaannnnnddddd aaaaaaaiiiiiiiiyyyyyyaaaaaammmmmmmm teeeeeeeelllllliiiiiinnngg yyyyooooooouuuuuuuwwwaaaahh...