I don't know if theres any HALO fan out there, but i got a news for all who have heard of this game. The HALO movie is still under construction. Heres a link which might give you some idea as to how the movie might look.
Plus if you are patient and have the speed to view this video from youtube then heres the link that show a 8 minute short movie from the upcoming Movie HALO http://www.youtube.com/watch?v=4ztR6C-zI5c Watch the three short movies, the rest is upto you.
Weather it is real or not... let the time decide. All i can tell is the movie was supposed to be released in 2009. Lets keep our fingers crossed and hope it doesn't become like DOOM ><