The premise that every single person who has purchased a Halo videogame, or nearly every single person who has purchased a Halo videogame, will automatically go out to see a Halo movie is such nonsense. Firstly this sure hasn't held with previous videogame franchises and some have been very popular game franchises. Secondly most people don't go to the movie theater at all and they aren't going to be persuaded to start going for a videogame movie. Lastly most people who play Halo, or any other game for that matter, care about playing the game and nothing else to with the franchise. Most people that play games simply play the games and that's it. They don't post on forums and they don't buy books about the game and they don't sit in anticipation of a movie adaptation. Many Halo fans will flock to the movie if it is made, but many more won't.