In 1998, Warner Bros. had been paying attention to the recent successes of their rival Disney putting Beauty and The Beast and The Lion King onstage, as well as Andrew Lloyd Webber's splashy take on Sunset Boulevard. Clearly movies-into-musicals were the next big thing, from their POV. To helm a musical based on the Goddamn Batman. However, a dedicated fan has preserved the demos recorded during the show's development. Listen at your own peril here. Demo recordings and other details about the production can be found here.