The Batman Who Laughs burst onto the scene in Dark Nights: Metal and quickly became a massive part of the DC Multiverse. A Batman from an Earth where killing the Joker remade him in the image of the Clown Prince of Crime, he gave DC the evil Batman they were searching for. He soon became DC's go-to big bad, battling the heroes in his own solo miniseries, titles like Batman/Superman, and finally becoming a universe-shaking threat in Dark Nights: Death Metal.
Source：https://www.cbr.com/powerful-dc-superheroes-can-beat-batman-who-laughs/
