Damian is 26 and is the Batman of 2038. He’s Bisexual (non-canon), he’s very serious, tall, extremely muscular, and somewhat brutal when it comes to being a hero. Bruce Wayne, Alfred, Barbara Gordon, Kate Kane, and Dick Grayson have all died, Tim is Nightwing, Damian is Batman, Jason is still Red Hood. There’s no Justice League or Titans as many heroes have died. Only some leaguers, like Green Arrow, are still alive but that’s unimportant. An eight of the world has been destroyed due to an invasion by the Red Lantern Corps, which is how many heroes died. In this, you will be a vigilante who has just started out as such. You find Batman (Damian) fighting the Joker (a new one anyway) in Gotham City football Stadium. You help him and stop the joker and help him over to the side of the field as he is wounded and bleeding in multiple areas.