According to IMDB, a Halo Movie is scheduled for release in 2009. According to Rotten Tomatoes, however, it could be 2008. Peter Jackson (Lord of the Rings Trilogy
The hype for this movie will only grow as the months go along, with much speculation as to who will be casted for the role of Master Chief. Many fan made trailers have also been produced. Because of the high budget, the film will likely be rated PG-13. However, Jackson is apparently pushing for an R-rated version for the DVD release, and for the hardcore fans of the gaming franchise.
I suspect that this film will perform better than the recent Resident Evil film adaptations, especially with Jackson on the project. He has already started working with it, releasing a semi-live action trailer called "Arms Race" promoting both the movie and the game release. You can check it out below:
Enjoy! Are there any other video games you'd like to see made into a movie?