Batman: The Long Halloween, Part 2 (2021)

Directed by Chris Palmer and featuring the voices of Jensen Ackles, Naya Rivera, Josh Duhamel and Billy Burke, Batman: The Long Halloween, Part Two continues Batman’s investigation into the Holiday Killer as Gotham’s conflict between organized crime and its growing supervillain population intensifies. Harvey Dent’s personal collapse and transformation into Two-Face become central as Batman, Gordon and Dent’s alliance fractures. The film completes the animated adaptation of Jeph Loeb and Tim Sale’s Batman: The Long Halloween.

Från IMDB:
The killer known as Holiday continues to stalk the Falcone crime family while a new class of costumed criminal rises in Gotham City. Batman suspects that a former ally might be the serial killer.