According to the site, The Long Halloween won’t take place in the shared DC Universe Animated Original Movies universe, but rather a standalone story similar to The Dark Knight Returns, The Killing Joke and Gotham By Gaslight adaptations, and will feature a voice cast that includes Troy Baker, Jensen Ackles, Naya Rivera, Titus Welliver and David Dastmalchian.
If you’re unfamiliar with Batman: The Long Halloween, here’s a synopsis:
“Christmas. St. Patrick’s Day. Easter. As the calendar’s days stack up, so do the bodies littered in the streets of Gotham City. A murderer is loose, killing only on holidays. The only man that can stop this fiend?