Movies must translate a story to an entirely different medium, and that always means changes. More often than some would like to admit, changes are also needed, in many cases, to find a sufficiently-large audience.
When Mary Zimmerman was announced to direct/adapt Disney's The Jungle Book, I was surprised. I never thought the production would materialize (Pinocchio, anyone?), but knew that if it did, I'd have to see it.
Quick: would you rather pay $115 (or $303 to a ticket broker) to see the misbegotten offspring of Walt Disney and Mary Zimmerman, or pay nothing whatsoever to see a powerhouse re-interpretation of Clifford Odets's Depression-era howl of protest?
In recent decades, movie musicals that began as full-length animation features and original movie musicals have become multi-million dollar stage vehicles drawing audiences into theatres in cities around the world.