Moviegoers who show up to see Robert Pattinson play To Catch a Predator host Chris Hansen in Primetime will first find themselves face-to-face with the real thing. Hansen has purchased preshow advertising on every screen showing the upcoming A24 release, The Hollywood Reporter has learned. In the spot, he directs audiences to TruBlu, his streaming network devoted to the same kind of predator investigations that made him famous. The film, a dark exploration of Hansen’s specialty of luring suspected sex predators into nondescript suburban kitchens before confronting them on camera, opens Sept. 25 following its world premiere Sept. 5 at the…