When does Batman: The Long Halloween return?

Part 1 is the 44th film, and Part 2 is the 45th of the DC Universe Animated Original Movies, with both serving as the third and fourth installments of the Tomorrowverse. The film is directed by Chris Palmer and stars the voices of Jensen Ackles, Josh Duhamel and Naya Rivera in her final film role. In both parts of the film, Batman attempts to unravel the mystery of murders committed on holidays throughout the year, and uncover the true identity of the serial killer Holiday.