Batman and Joker are two sides of the same crazy coin, according to some comics in the Dark Knight’s 74-year history. The thinking goes that you have to be insane to do what each character does and that their unique relationship binds them in a symbiotic way. So it makes a weird bit of sense that the same guy is going to be playing both characters, albeit in a different medium.
Troy Baker -- the voice actor who’s probably best known for being Vincent in Catherine and Booker DeWitt in BioShock Infinite -- isn’t just doing the voice of the Joker in the Batman: Arkham Origins video game. He’ll also be doing the voice of Batman in LEGO Batman: The Movie — DC Super Heroes Unite, the upcoming movie that parallels last year’s Bruce Wayne + everybody else video game. There’s no footage yet of Baker’s portrayal of the Joker but you can listen to how he voices Batman in these LEGO Batman clips
Baker’s no stranger to playing other Bat-universe characters, either. Not only did he play Two-Face in Batman: Arkham City, but he also played Robin in that game’s Harley Quinn's Revenge DLC too. Hell, Baker played Batman, Two-Face, Sinestro, Brainiac and Hawkman in Lego Batman 2! Pretty soon, there’ll be a Batman game where Baker plays all the characters by his damn self. Those are going to be some crazy recording sessions. Crazy, I tell you.