A Gears of War film adaption was announced in 2007. But the following years it went through hell. It even came up to a point where the project was abandoned. Fast forward to 2016 and we can see the project being brought back to life.
During the livestream presentation for the release of Gears of War 4 in 2016 it was announced that the movie is going to happen. It was already known Universal Pictures bought the rights for a movie 7 months earlier from Microsoft Studios. Rob Fergusson, co-creator of Gear of War, said it is not yet known if the movie is going to follow the storyline of the games or wether it will dive into a new chapter.
What we do know is that Shane Salerno is the screen writer. You will most likely know him from mega cinema hit Avatar where he wrote the script for. Next to this heavy weight they also got Dylan Clark to produce the movie, who has also produced Planet of the Apes most recently.
More recently Dave Bautista, former wrestler and Guardians of the Galaxy superstar, expressed his desire to star in the Gears of War movie as Marcus Fenix. He sure has the build for the character, but we will have to wait a little bit more until the script is done before they will announce the casting.