NeoGAF posters havethat Gears of War 3 has been leaked online, as seen in the YouTube video below.
As you can see from the modded Xbox 360, it's running on a JTAG system, so don't expect the game to be widely released.
Gears of War 3 will be released for legitimate owners on September 20, 2011.
Gears of War 3 leaked
03 July 2011 | By JonahFalcon