Of course, it doesn't sound like we'll be getting Jerome straight away in Season 4, but that's not necessarily a bad thing. There are plenty of stories from the Season 3 finale that still need to be finished. Barbara won't be out of commission indefinitely, despite her electrocution and seeming death in the finale. The Riddler has been frozen in a block of ice to be kept as a prize by Penguin. Butch turned out to be a major villain from Batman lore, and we definitely need some answers about how he's still among the living. Throw in the fact that Scarecrow will be back with a vengeance, and there will undoubtedly be plenty of Gotham action without Jerome spreading his particular brand of madness around the city.