Joss Whedon in particular seems to have some GREAT properties well suited for Broadway. Dr. Horrible's Sing-Along Blog is tailor made for Broadway, and Buffy's already proven it can work as a musical on TV. Do I think 'The Incredible Hulk' would work as some kind of mad, operatic Broadway Musical? Heck Yes I Do!
But perhaps the Broadway musical that would MOST excite me would be a 'Final Crisis
' Musical. Imagine a chorus of Darkseid's minions chanting as they drag the Earth down into darkness, Batman's death song as he breaks his two most solemn oaths, never to use a gun and never to kill, and of COURSE the shows-stopping number when Superman literally sings the universe back into existence with a song. Final Crisis is everything a good musical should be: Epic, crazy, and colorful.
If Spider-man works on Broadway, maybe...just MAYBE there is hope for a 'Final Crisis' Broadway musical. And since watching that musical is on my bucket list, I sincerely hope 'Spider-man: Turn Off the Dark' is a spectacularly good show.