I haven't seen Wonderful Town, but Aida is perfect for that age range. It's got a rock/pop score, cool sets/costumes/characters and cute guys. :) Wicked would have been amazing though. Why did your tickets fall through?
Also, Raisin in the Sun would probably be a bit too heavy for that age. Plus it's not really a spectacle piece, and I personally think would be more effective and understandable if it was studied at school first. (We had to do that when I was in high school.) Otherwise, aside from P. Diddy, it might seem kind of dry.
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