Anecdotes

As with other adaptations of his works, Alan Moore is not credited in this film as he refuses to be associated with it.

First part of a multi part adaptation of the Alan Moore comic book.

Paramount's first animated film to be rated either PG-13 or R by the Motion Picture Association (MPA) since Anomalisa (2015).

First DC Comics animated project co-produced by Paramount Pictures since Secret Agent (1943), the last animated short of Superman from Fleischer Studios, Famous Studios and Paramount Pictures Cartoon Studios.

This is the 2nd of DC Comics related animated adaptations that Adrienne Barbeau has voiced. The first being Catwoman for the 90's run of the Batman animated series.