It could just be a big ol' title update shoved down the Xbox Live pipe for Gears of War 1 and/or 2. Epic's Kinect offering is the Kinect headliner for Microsoft.
At least that's what the tipster has spilled the beans on as Microsoft will be using the Spike TV VGAs to announce a few Kinect titles in development, with Epic's Gears of War announcement planned to steal the spotlight.
Microsoft of course "can't comment on rumor or speculation." Would a whole new Gears, of even an updated GOW1/2 with controller-less shooting get your attention?