Update: The full release date has been announced as March 19, 2013.
Epic director of production Rod Fergusson has confirmed to IGN that Gears of War: Judgment now officially has a release window: March 2013. No specific date was given just yet, but the full release date is expected to be announced at the Gears of War: Judgment panel at Comic Con later today.
The game was originally announced at Microsoft's pre-E3 press conference and is a prequel to the first three games in development by People Can Fly (who also developed Bulletstorm). Judgment will cover the events that happened to Cole, Baird, and the rest of Kilo Squad after they're arrested for treason.
Stay tuned for the full release date later on today.