When the status-quo between Batman and the Joker that kept everything in place had been shattered. A new threat that would forever change the games between them. A need to adapt and rectify everything was in order. Joker had almost lost his playmate for good. He wasn't about to let that happen again. Batman just wants to prevent what seems to be the inevitable, not that the Joker would ever make that easy for him. *BatJokes. Batman/Joker