If Disney should do anything else on the stage, I hope it is Alice in Wonderland, Hercules, or Hunchback. Alice would be visually fantastic, and Hercules and Hunchback have great scores!
"I'm a bagel on a plate full of onion rolls!"-Funny Girl
It has been a personal goal of mine to bring "Nightmare Before Christmas" to the stage one day, for a very long time. It could be amazing. I think Phoebe Strole could be Sally...
As far as financial bonanzas, I think Aladdin could be wildly successful, and I think it would have been a much easier transfer than the Little Mermaid. I'm personally surprised it hasn't been adapted already (especially because "A Whole New World" is an effing great song).
I think "Alice In Wonderland" would be cooler if it was a non-Disney production.
And finally, the movie version of "Mulan" is an absolute snore, and I can't imagine that would be improved on stage.