Saw helmer James Wan to tackle Texan vampires? Saw helmer James Wan has signed on to direct Nightfall. The graphic novel was created by Scott O. Brown and Ferran Xalabarder; it follows a conservative Texan, David Paxton, who winds up in a prison run by vampires. According to reports the film version will be a departure from the specifics of the original, as is said to be the case with the studio’s upcoming Cowboys & Aliens. Wan’s next film, Insidious is set to debut at the upcoming Toronto International Film Festival.