According to Edge Online, sources have told the magazine that a Gears of War 3-trailer will be released next month and that the game itself will be released in April 2011. It's supposed to be finished well in advance, but Microsoft has pushed it into 2011 because they want Halo: Reach and Natal to be the big hitters this fall and holiday, respectively.
If the source is to be believed, the trailer in question is coming out on April 8. We'll just have to wait and see. If we're lucky, it will contain more love scenes. Gears of War is all about the romance, baby.