Red Death (DC)

The Red Death is a villainous version of Batman from the DC Comics universe. He is a member of the Dark Knights, a group of vigilantes from the Dark Mutiverse whose goal is to assist the deity Barbatos plunge the central DC Multiverse into darkness.

Origin
The Batman of Earth -52 once fought crime with the help of his sidekick Robin. Unfortunately, as time went on, many different Robins lost their lives during various missions with the Caped Crusader, which drove him to adopt more extreme methods towards crime-fighting. When Earth -52 was on the verge of destruction, Batman decided to forcibly merge with The Flash and use the Speed Force to stop crimes he otherwise wouldn't have time to prevent. The Flash tried to reason with Batman, knowing he was still grieving over the lose of most recent Robin, Damien Wayne, and that using the Speed Force in such a state could be dangerous. However, Batman used weapons from Flash’s rogues gallery to knock him unconscious before tying him to a modified Batmobile, which was installed with the cosmic treadmill’s engine.

Batman drove Flash into the Speed Force and both soon returned as one being, with Bruce gaining Flash’s powers and a corrupt connection to the Speed Force while Barry’s consciousness became trapped inside Bruce’s body. With his new abilities, Batman quickly murdered his own rouges gallery before realising he was still to late to save his world from destruction. He then received a visit from The Batman Who Laughs who told him there was still a way save his world by joining Barbatos’ Dark Knights and aid the deity in conquering a Multiverse above their own. Batman accepted his counterpart’s offer and became known among the group as The Red Death.