Hush
A twisted version of Bruce Wayne, Hush would be a great villain to devote a prequel story to, mainly because he’s a villain we still haven’t seen in live-action yet. His backstory is still unknown to a majority of mainstream audiences, and it’s that sort of foundation Warner Bros. should focus their energy on instead of popular characters like The Joker.
Hush, real name Thomas Elliot, grew up as a childhood friend of Bruce Wayne, and always tried to teach young Bruce how to strategize and outthink his opponents. Elliot unfortunately had an abusive father and a weak mother, which eventually pushed him over the edge. He staged an accident by cutting his parent’s brake lines, which killed his father and injured his mother, who was only saved by Dr. Thomas Wayne, Bruce’s father. This set up a long standing vendetta between Elliot and Bruce, which would cause Elliot to try to kill Bruce again and again.
That’s a story that deserves its own movie. It would be fresh, exciting and allow for Batman to be apart of the film without actually being apart of the story. Imagine a Dark Knight movie without the hero as a main character. It’s an interesting idea that Warner Bros. needs to make happen.