This is James Gunn's Dcu With what he has revealed I will build off of it and create my own. Building off of the start of his universe.
Damian Wayne is the biological son of Bruce Wayne and Talia al Ghul, and thus the grandson of one of Batman's villains, Ra's al Ghul. Talia would become pregnant with him after a sexual encounter with Bruce, but would keep their son's existence from him for a decade.
the movie opens on Deathstroke attacking the league of assasins. Slade almost kills ra's al ghul and they put him into the lazarus pit. We cut to Batman fighting killer croc then out of knowhere talia shoots croc and he crawls back into the sewer. talia leaves damian with bruce. deathstroke kidnapped dr kirk langstrom to make a serum. Bruce investigates langstroms disappearance and teaching damian justice not vengeance. Nighwings comes and helps batman and damian. Deathstroke kidnaps talia so damian and bruce heads to rescue her. When they get there hundreds of man bats with one bigger than the othe kirk made a serum that turned him and slades soldiers into bats damian and bruce fight them. Deathstroke comes in batman is still fighting the man bats while slade fights damian and threatens to kill talia. nightwing investigated langstrom he found an antidote he saves batman and damian. slade shoots talia and damian chases him. Damian and nightwing defeat slade all 4 of them escape while we see slade also escaping.
