Saw this on IMDB.com this evening when checking out the new Keanu Reeves flick "Constantine" ........... Trivia for Constantine (2005) Although the movie Constantine is based on the comic book Hellblazer, the movie title was changed because it was too similar to Hellraiser. The comic book itself was actually meant to be called Hellraiser, but Clive Barker came up with the title first. In the comic book "Hellblazer" on which the movie is based, the character of John Constantine is from Liverpool. In the movie, the character is from California. According to the director at the 2004 Wizard World Convention in Chicago, the decision to make John Constantine American was made because Keanu Reeves was cast in the part and it was felt he couldn't play a convincing Brit. The appearance of John Constantine in the comics was based on the singer, Sting.