Look, we know how your mind works. One day, you were sitting around, thinking about how you could lay your hands on the God of War III demo. Then, all of a sudden, it hit you. You figured out how to game the system. "Easy," you thought, "I'll just order the District 9 Blu-ray from Netflix, grab the demo, and send the disc back. Bam, free demo." Alas, it looks like Netflix has seen through your paper-thin ploy, as tipster Caleb tells Joystiq that the demo isn't included with the Netflix version of the film. A quick look at the God of War community forums reveals the same story.
Sorry to spoil things. Maybe your next evil plan will work out better.