WATCH: 12-Minute Sneak Peek of "Batman: The Killing Joke" Animated Movie

With the release of "Justice League vs. Teen Titans," some of the feature's bonus material has made its way online, and been drawing a lot of attention from fans -- including a new featurette that gives us our first fully-animated look at "Batman: The Killing Joke," along with a discussion with the film's creative team about adapting the seminal Alan Moore/Brian Bolland Batman tale.

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The 12-minute teaser video includes interviews with several key players on the animated movie, such as director Sam Liu, producer Bruce Timm, and DC's creative director of animation Mike Carlin. The producers discuss the difficulties of adapting Bolland's art for the feature, and some of the alterations to the story -- which includes an expanded Batgirl backstory.

Additionally, the featurette provides a sampling of Kevin Conroy (Batman), Mark Hamill (The Joker), Tara Strong (Batgirl) and Ray Wise (Commissioner Gordon) in the film.

RELATED: EXCLUSIVE: Kevin Conroy & Mark Hamill Star In Animated "Batman: The Killing Joke"

"Batman: The Killing Joke" releases direct-to-video later this year.

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