Fuck the Riddler we've seen him already and he'd basically be Joker without the fear. Instead of jokes it would be all riddles. I want to see Mask of the Phantasm in the next film. He was the Batman impersonator from the animated series and He had a vandetta against the Joker who is still alive in the series.
Imagine this scenario Batman after taking blame for the murders commited by Two face and llauded by the public, seemingly turns to violently killing criminals and set his sights on vengeace against the joker who is well protected in Arkam so a battle ensues between Batman and the Phantasm who turns out to be his latest love interest. That has the potential to be just as dark and cunning as the Dark Knight.
So again I repeat fuck the Riddler!
