3) The Riddler
Jim Carrey’s take on The Riddler was certainly more than acceptable for its time and mostly worked because of the kind of movie it was featured in, but we’ve yet to see this villain truly done justice on the big screen.
For Ben Affleck’s Batman, ditching the silliness seen in past iterations would be acceptable, but whoever were to take on the role could still have fun with it given how completely insane Edward Nygma is. That madness shouldn’t overshadow his intelligence though, as bear in mind that The Riddler is one of the Dark Knight’s only villains to have figured out his secret identity.
Scott Snyder and Greg Capullo’s recent Zero Year story arc did a fantastic job showing what a huge threat The Riddler can be as he was depicted as taking over Gotham City and outsmarting Batman again and again. A movie revolving around a villain who uses riddles and is no sort of physical match for the Caped Crusader could be a hard sell to moviegoers used to epic action in their comic book movies, but that’s something which could easily be sorted by pairing The Riddler up with someone who could deliver those large scale action scenes, as him having an underling makes a lot of sense anyway.