In order to flesh out the story of The Killing Joke, which takes a scant 64 pages of comics to tell, DC indicates that a prologue will be added to the story to provide context (and some extra running time). Sam Liu, who directed Justice League: Gods & Monsters, will helm the adaptation of The Killing Joke, which should be hitting retail about this time next year.
DC also announced two other projects with Warner Animation, and original Batman saga, Batman: Bad Blood, which will feature the introduction of Batwoman to the direct-to-DVD series, and Justice League vs. Titans, which will be the first film in the series of animated films that will feature the Teen Titans.