Lily Bridge, a young journalist, arrives at Arkham City, hoping to find a big scoop. However, with all the strange things occuring around the city, only the exceptional findings are news-worthy, such as the mysterious mecha known as Demonbane. However, upon finding a small piece of machinery that seemed to be connected with the Hadou Combine, Lily is determined to find the truth. Little does she know, she enters into a dark world, involving herself with Demonbane and the powerful forces that control the city.
Unfortunately the movie Kishin Houkou Demonbane is not yet available on HBO Max.
| Directing | Shintaro Inokawa | Director |
| Visual Effects | Masaaki Sakurai | Character Designer |
| Art | Shintaro Inokawa | Storyboard Artist |
| Writing | Katsuhiko Takayama | Screenplay |
| Directing | Hong Heon-pyo | Second Unit Director |
| Visual Effects | Masaaki Sakurai | Animation Director |
| Art | Yukio Takatsu | Storyboard Artist |
| Art | Yukio Takatsu | Prop Designer |
| Visual Effects | Hironori Nochi | Color Designer |