I know many folks were worried that there wouldn't be a good replacement for Mark Hamill as the voice of the Joker for Batman: Arkham Origins. Well, let me tell you, no, let me show you why you don't have anything to worry about.
At the New York Comic Con, the many talents of Troy were shown as he performed the one of the great monologues from The Killing Joke, an awesome graphic novel that I read many times in my childhood. He not only performed an incredible reading of the monologue using the voice of the Joker, he also sang a little diddy as the Joker as well.
October 25th is the game's release and you can be sure the Joker's voice is in very, very good hands.