WARNING! Spoilers for Batman: Dark Age #6The Joker has been Batman’s darkest enemy since his debut in 1940, and although he’s been granted ample opportunities to kill him, Batman always refuses to take his life. Now, that choice has paid off at long last, as the Joker changes his ways as a direct result of Bruce Wayne’s influence in one alternate universe. The Joker’s redemption arc marks a momentous occasion in DC lore and proves that Batman’s mercy isn’t entirely unfounded.