Batman: White Knight stopped with a fist, i.e. Batman's methods. This led him to turn the Joker into a politician, using the character's intelligence and charisma to win the people of Gotham over. DC Comics had no problems with the ideas that Murphy had for the series such as changing the timeline in Batman's history. However, the adult content like nudity and profanity that Murphy had intended to include were not permitted. Murphy revealed that the Joker in "White Knight" has the real name Jack Napier, a callback to Tim Burton's 1989 "Batman" film where the Joker played by Jack Nicholson also shares
The Batman Adventures: Mad Love costume which anyone can fabricate). When Joker arrives, however, he is infuriated that Harley would try to kill Batman herself and knocks her out a window, where she is found by nearby police officers. Joker then decides nonetheless to use the opportunity to finally kill Batman, which escalates into a wild chase ending atop a moving subway train. Batman taunts Joker by saying that Harley came closer to killing him than he ever did. Joker attacks him in rage, but Batman sends him lunging into a burning smokestack. Back in Arkham Asylum, a severely injured Harley Quinn renounces The Joker