The upcoming Gears of War movie, will not be taking the Hollywood "liberties" with the source material, the film's screenwriter Chris Morgan tells MTV that the film will be sticking to the characters and events of the game pretty closely.
It would be a crying shame not to deal with Marcus and Dom. I would not be interested in the movie if we weren't dealing with them. I want to see those guys. I want to see 'Emergence Day.' I want to see this stuff happen.
Morgan also promises that the Locust Horde will be turning up in full force for the movie, with bad guys like Corpsers and Beserkers making an appearance at some stage. All good news for Gears fans, but remember, Murphy's Law (of game movies) demands that this movie suck. It demands it. But hey, if that happens, at least it'll suck authentically.

[SOURCE]