9) Black Mask
Because Batman is such a unique character, there are really countless paths that his movies can go down in terms of tone. It could be a straightforward superhero summer blockbuster, a detective/murder mystery, or pretty much even a horror story if the action were to be set in the halls of Arkham Asylum like some of his most popular comic book arcs.
It could also be a crime story, and that’s where a villain like Black Mask could come into play, as there’s a lot of great material to mine from his appearances over the years.
A ruthless mob boss, Roman Sionis has an extreme hatred for Bruce Wayne (meaning the villain could factor into things when Bruce is out of the costume, too), and a sadistic talent for torturing his victims. Perhaps the most shocking moment in his history came when he tortured and killed Stephanie Brown, a female Robin who would later become known as Spoiler.
To make Black Mask a movie’s big bad, there would need to be a truly great crime story at play, but Affleck has already shown that he’s more than capable of delivering on that front after directing The Town, so we’re good to go!