In the Regime Universe, Batman was a crime fighter in Gotham City, and later the public leader of the Insurgency.
History
He frequently quarreled with the criminal mastermind known as the Joker, although despite Joker's actions, he refrained from killing him. This ultimately came back to haunt him when Joker decided to fight and corrupt Superman instead. After the Joker managed to steal a nuclear bomb and forced Superman to kill Lois Lane and destroy Metropolis via the nuke, Batman presumably managed to capture Joker and brought him over to the GCPD to interrogate him. However, he eventually witnessed an enraged and grief-filled Superman angrily murder the Joker for his actions and losses by impaling him with his arm.
Powers and Abilities
+300% damage on basic attacks when opponent shocked.