ANY Broadway show can be adapted as a film. You just need a director with a proper vision. The vision can be either a straight transfer, or a twist (such as what Condon did with CHICAGO). The vision and its execution is what counts.
"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