With the release of the official Batman Vs. Superman full trailer came a whole slew of Joker theories in which there is speculation as to a Jason Todd Joker. Who is the joker? The Comic Con 2015 Batman Vs. Superman trailer revealed a few clues that have spawned numerous Batman vs. Superman joker theories. The Jason Todd Joker theory revolves around the idea that the Batman Vs. Superman joker is Robin. In the Frank Miller Batman comic The Dark Knight Strikes Again, the Jason Todd Robin becomes the New Joker. Who is the new Joker? A popular Batman fan theory points to none other than Batman’s Robin. Batman and Robin have always been allies but events in A Death in the Family drastically changed that dynamic. The Batman Vs. Superman Robin could possibly be the Joker.