Arguably the best Batman comic ever written, the one-off Batman: The Killing Joke, is being turned into an animated film, DC Comics announced at Comic-Con today.

Bruce Timm, who has worked on a number of DC animated series, will executive produce the new movie, which is due out sometime in 2016. It will be one of three movies released next year under the DC Universe Original Movies banner. Unlike The Killing Joke, both of the others--Batman: Bad Blood and Justice League vs. Titans--will be original stories.