Beauty and the Beast and Seussical are already getting there, I've heard of way too many high schools doing them recently.
Spelling Bee, maybe if it was edited (which always scares me). No administration would let a high school student perform "My Unfortunate Erection".
Everyone is worried about Wicked because of all the obsessive fans that want to do it now, but by the time the rights are released for the show, the fervor will have died down some and the current obsessive fans will all be in college and beyond. Unless these kids saw Wicked at age 6 or something, they're not going to aspire to be the spitting image of Kristen or Idina the way the fans do now.
Like a firework unexploded
Wanting life but never
knowing how