Batman: The Long Halloween, Part One

The name of this movie is Batman: The Long Halloween, Part One released in 2021-06-21 and it's main theme is A brutal murder on Halloween prompts Gotham's young vigilante, the Batman, to form a pact with Police Captain James Gordan and District Attorney Harvey Dent in order to take down The Roman, head of the notorious and powerful Falcone Crime Family. After more deaths occur on Thanksgiving and Christmas, it becomes clear that they're dealing with a serial killer - the identity of whom grows harder to discern with each conflicting clue..