Now this isn't for sure but I found out that in [Batman: Arkham Knight](tag:2683936), the Arkham Knight and Tim Drake are being voiced by the same person who is as we all know Troy Baker. Now, he is also a voice actor for another character in the game as one of the most infamous villians known as Two Face.
I highly doubt that Two Face will be the Arkham Knight. Two Face isn't as fast or as strong as the Arkham Knight appears to be and the skill and Martial Art is somewhat similar to the Dark Knight. Although a lot of people speculated that Jason Todd would be the Arkham Knight it doesn't seem like he is going to be the symbol for Arkham Asylum.
For those of you who don't know who Jason Todd is he is the second robin after Dick Grayson. Jason Todd was brutally beaten with a crowbar by the Joker in an abandoned warehouse and was left to die, then eventually the warehouse was blown up and Batman was too late to save him and a year later Jason Todd is resurrected and returns to [Gotham](series:1127075) City as the Red Hood and becomes an anti hero.