Out of all the characters in the DC Universe, Batman has the most varied dynamics with his villains. Each one is a foil to him in their own unique way, a mirror shining a light onto a different part of his psychology. Yet, one could argue that they also provide some of the most meaningful relationships within his life, as no matter what happens, Batman will always have his villains. Recent events in The Penguin #1 (by Tom King, Rafael De Latorre, Marcelo Maiolo, Clayton Cowles) though, bring to mind another moment with another of Batman's infamous enemies: the Joker.
Source：https://www.cbr.com/batman-dying-with-penguin-joker-endgame/
