Rocksteady announced that Batman: Arkham Knight isn't only the name of the game; it's the name of a villain as well. So who is this mysterious figure? Well, first off Geoff Johns and RockSteady created the character and stated that he is brand new. Created from scratch, built from the ground up. There are a plethora of theories, a lot of them consist of the character being someone already established. Such as Hush, Or Jason Todd.
That, however, seems unlikely. Like I've said before this character is new. It would be a waste to just make it someone we already know. Alright so here is my theory..........
ITS JOKERS SON!
Hear me out. The Joker and Harley Quinn had a child, presumably a boy. This revelation was sort of an Easter egg in Arkham city. There was a lot of emphasis put into this revelation by the creators, for example, in the credits we hear Harley Quinn singing a La La By and joker as well. Rocksteady wouldn't just move on without giving this kid some sort of role. What better role than a Villain role! It makes sense too because he was born there, his father died there, and he was presumably conceived there. His whole life revolves around Arkham Asylum, so it makes sense he is the hero of Arkham( or villain).
Yes, you're probably wondering how he got so old? Well there is an explanation for that. Cadmus labs, one of our fellow CBMers found a Easter egg in Harley Quinn's Revenge which was a Cadmus labs poster. So Harley wants revenge on batman right? So what better way to do that then create a Killing machine out of your very own son. This is where Cadmus labs comes into play. Cadmus labs accelerates the babies growth, making him into a grown man in peak condition. But what does Cadmus get out of this? That's what I can't figure out so if you have any suggestions let me know below!
However, I do have alternatives to this situation. Maybe Cadmus approaches Quinn cause they want to create their own batman. Or......
Hugo Strange comes into play. Let's say Hugo Strange is revived by the Lazarus pit, he could work with Quinn too create Arkham Knight out of her child. The game does after all say all the villains team up.
So that's my theory! This is my first editorial guys, so let me know if you liked it. If you have any suggestions let me know below. Sound out your thoughts below as well!!