The film is based on the comic series "Hell Detective" published by DC Comics/Vertigo. The series of comics can be put on the big screen. Producer Lauren Schuler Downer played an important role. As a producer who has participated in the production of "Mermaid's Fairy Tale" and "X-Men" series and "Electronic Love Letter", Downer was moved by the unique situation and attitude of the protagonist of the "Hell Detective" story. She believes this story It has dramatic potential and is worth making into a movie.
Because Downer successfully produced Oliver Stone's "Challenge Sunday" and the famous romantic comedy "Dave" for Warner Bros., Downer successfully persuaded Warner Bros. to invest in the filming. Downer invited Kevin Braudbin, the screenwriter of "Ambush on All Sides," to adapt the script. The Batman film producers Michael E. Osland and Benjamin Melnick also joined the team behind the scenes.
The screenwriter Braudbin is a big fan of "Hell Detective" and has always hoped that Constantine can be written into the script. During the adaptation process, Braudbin's attitude is serious and serious, emphasizing that the most important thing is the real shaping of Kang. The image of Stantin. His idea was unanimously affirmed by the chief creators, and the screenwriter Frank Kepero, who later joined, was also convinced. Because of the attraction of Donner's creative ideas, producer and screenwriter Aziva Gosman also decided to join.
Producer Owen Stoff, who has worked with Keanu Reeves for 10 years, was very optimistic about the script of the film. He sent the script to Reeves, who was filming "The Matrix 3: Matrix Revolution" in Sydney at the time. As expected, Levi's immediately fell in love with Constantine. In addition, Levi's also participated in character design, and even many of Constantine's dialogues in the film were arranged by him himself.
