No word if Disney will produce it, but based on Titanic: The Musical, Mirvish's new show in Toronto, perhaps 9/11 On Ice could make it's way to New York, Chicago, London and Hogtown at some point.
Perhaps the historical pattern with grand tragedy is that you first make a serious dramatic film about it, then wait for all relatives to die, then make a romantic version (Cameron's Titanic), and then a song and dance production. So maybe it'll take a hundred years or so, but we'll get there.
Clefto commented on this over at my blog at hobogauntlet.blogspot.ca:
"In the early morning hours
The planes brought down the towers!
(step, step, kick. Step, step, kick)
A horrific attack!
It must have been Iraq!
(step, ball, chain. jump and kick.)"