Beneath Gotham: The Making of a Monster.

I've left the rest up to you! If you're struggling to start perhaps you can go - 'Make sure this never happens to anyone arc' and make enemies along the way of killing the black group. And make batman chase after you.

Or go back to the back group and become one of them and etc etc.

Or mayhaps make it all angst and become a vigilante and batman will turn his head your way and recruit you.

The possibilities are endless. Creativity is everything:))

I finished Arkham Knight in one day and now I'm sad.