I enjoyed seeing it performed as a stage version at Disney's MGM Studios in FL before they closed it for another attraction (which got cancelled and that space is still empty!). While it was of course a theme park show, one could just imagine how it could be expanded.
BUT
If they're going to adapt the show for Broadway, I say take a chance and make it for adults. Screw the "family" aspect. Cut the talking gargoyles and the "Guy Like You" song. Make it dark.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle