The most discussed graphic novel in the history of Batman comics has been released as a direct-to-video movie. Here’s the trailer for the new R-rated animated film, The Killing Joke.

While the film is certainly not safe for work, the trailer is okay to watch at work. It’s still very intense, and very dark.

This is the story line where Barbara Gordon is shot and left paralyzed from the waist down. This is the story line where the Joker descends to his darkest and pulls the Batman down with him. It’s the beginning of the Batman’s current grim persona. He was dark before, but never like this. The Killing Joke was originally released as a one-shot back in 1988, and provides an origin story for the Joker. It shows how the Joker’s obsession with Batman came to be, and it is very definitely an ugly, ugly story, particularly with respect to what happens to Barbara Gordon (Batgirl). Joker shoots her through the spine, then photographs her nude to torment her father, Commissioner Gordon. It was a tragic turning point in the Batman saga, though DC finally decided to relent and retcon her injuries so that she could once again don the cape and cowl. She now features in her own Batgirl series.

To be quite honest, the trailer really isn’t a very good one. It’s as though it was put together by somebody who really doesn’t understand how to do trailers. We think the actual film will be better than this.

This film has a cast of all-stars. Kevin Conroy and Mark Hamill reprise their roles as Batman and Joker, with Tara Strong as Harley Quinn. The film is due out from Warner Bros. Home Entertainment in July of 2016.