What Happened To Everyone Who Killed Batman?
2. Himself
In addition to those other characters who have killed him - either permanently or on a more temporary basis - Batman has actually taken his own life on occasion.
The most notable instance of this came in Mark Millar's impressive 2003 Elseworlds tale, Superman: Red Son, with the Dark Knight sacrificing himself for the proverbial greater good.
For those not familiar with Red Son, it's set in a world where the infant Kal-El lands in the Soviet Union rather than Kansas. As such, he's raised as a weapon of Stalin and the USSR as the Cold War looms large overhead.
In a story that flips the DC Universe on its head, the Batman of this world is an orphaned vigilante who is battling the Soviets - but to do so, he has to 'play the game' and try to manipulate the relevant chess pieces into place.
Working alongside Lex Luthor and the Head of the KGB, this mysterious take on Batman had his plans to take down Superman go spectacularly wrong. And by that, Supes intended to lobotomize Batman after rumbling the Caped Crusader's planned uprising.
Rather than lobotomization, Bats decided to make himself a martyr to the cause - detonating a miniature bomb that he'd previously swallowed.