If this is remotely true, the internet's going to fucking break. This post on VGChartz reckons New Xbox Experience will launch on September 25 alongside what sounds like a comedic amount of game announcements. Snip:
Microsoft will release a dozen new demos after the launch. There will be four new downloadable pieces of content a preview of the GTA DLC. A Mass Effect expansion. Portal and a free map pack for Halo 3.
Microsoft will unveil twelve new games never seen before that will be exclusive or first on the 360. Strangely enough the author only gives out code names for said games. Though they speculate that among them is Assassins Creed 2, Mass Effect 2, a new Conker title, a Rare shooter new franchise, and two new Halo titles.
Seriously, this is highly likely to be complete bollocks. Read it, though. If it's a lie, it's a great one. The codewords for the games are priceless.