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
Batman: A Death in the Family start a diplomatic incident. During his speech, the Joker attempts to kill the entire chamber with his venom. However, Superman intercepts the gas as Batman chases the Joker. The Joker gets out of the building and into a helicopter sent for him by his sponsors. Batman gets in and confronts the Joker; during their clash, one of the Joker's henchmen opens fire with a machine gun, hitting the Joker and Batman with gunfire. The pilot is also accidentally shot, loses control of the aircraft, and crashes it into the sea. Superman saves Batman, but is unable to find the Joker.