For fans who loved the 2005 superhero horror filmConstantine, the long-awaited sequel is in the works. It will bring back everyone's favorite human, Keanu Reeves, and director Francis Lawrence for another round of the cult classic, and this time, the director wants to go full force into its R-rating. Broadly based on the 1988 DC Comics Hellblazer, created by Alan Moore and Stephen R. Bissette, Constantine tells the story of the suicide survivor and demon hunter John Constantine (Keanu Reeves), who has been to hell and back and whose sole purpose on Earth is to send demons back to where they've come from.