2. The Red Hood

Now that it has been confirmed that The Joker will indeed be a part of Gotham (you can read more about that by clicking here), and with no solid origin story for the character before he started targeting the Caped Crusader, it's hard to know what direction the series will take the Clown Prince of Crime in. The most logical option is arguably to introduce him as the Red Hood as Alan Moore did in the classic story The Killing Joke! They could simultaneously take inspiration from Scott Snyder's recent take on the Red Hood Gang, and the group of villains could easily serve as a problem for Jim Gordon and the city for a whole season or more. Who knows, they could even have the series end with a young Batman causing The Red Hood's fall into the vat which transforms him...
