Frozen could easily be adapted to Broadway. Making many of the pieces into ensemble numbers wouldn't be difficult at all. For the First Time, as an example, could easily incorporate supporting work from the castle characters. Summer, as stated in a previous post, lends itself to an expansive number with Olaf in concert with any number of warm-weather characters.
There doesn't seem to be call for much (if any) flying rigs, which could leave much more money for incredible set design and large-scale creature and puppetry effects.