With less than, a 2 hours before the official Microsoft press conference from GDC, an official press release from Italy has confirmed the presence of some big games and new games. The Press Release also confirms to the Gears of War 2 to be exclusive to Xbox 360.
"Gears of War 2
From Epic Games. November 2008. Sequel to the best-selling (4.5M copies) Gears of War. Follows the story of Marcus Fenix and Delta Squad (Squad Delta?). 3rd person. Xbox 360 exclusive."
Gears of War 2
Go! Go! Break Steady
Ninja Gaiden 2
Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness
Debut Trailer : http://www.gamevideos.com/video/id/17628