This is set to be a busy year for Gotham's hero. With his recent blockbuster showdown with Superman, plus an appearance still yet to come in the upcoming Suicide Squad movie, we just can't get enough. DC Comics and Warner Bros. Animation have just dropped the trailer for the highly anticipated Batman: The Killing Joke, and animated adaptation of the graphic novel of the same name. Telling the story of The Joker's origin from failed comic to criminal mastermind, see the trailer below for what could be the dark horse Batman's finest hour this year.