According to reports, the next Gears of War game that will be unveiled in the next Game Informer and will be introduced at E3 2012 will be a prequel called Gears of War: Judgment.
The prequel will allegedly deal with Emergency Day, which occurred 14 years before the events of the first Gears of War. The game will focus on a young Marcus Fenix and show how he came to be jailed for desertion.
Stayed tuned for up-to-date reports at E3 2012.