BATKID: The son of Batman

What happens when the batfam mysteriously finds a little girl on the couch munching down Alfred's famous cookie .
But whats more surprisingly is that the kid claims to be the son of Bruce Wayne and asked who they were as he dogde the bullets as Jason shoots him ,while almost destroying the living room.

Five years ago Talia al ghul took his youngest son back after she found out that his son was almost about to die due to some circumstances that occured
Batman didn't fight as he thought that Alex was better off without him even though hus mother is an assassin .
Alex came to Gotham in search for his best friend and was not interested in meeting his father or his so called adopted brothers either and his elder brother that he never knew about.