Flashpoint Beyond (2022) #1

Batman's hunt for the Clockwork Killer brings him to Europe and face to face with the mad king, Aquaman. On the eve of Aquaman's sinking of London, Batman infiltrates his stronghold and goes on the warpath for answers. Nothing matters to Batman, whose world is already dead, but if he can track down the Clockwork Killer, Thomas can save his son's world and put everything back together again.