The annual Electronic Entertainment Expo kicks off early in Los Angeles . But Valve does plan to attend E3 , and misdirection from gaming companies has been known to occur before the show . Nintendo will demonstrate its forthcoming Wii U gaming system . On the software platform for the Xbox 360 , ` ` Halo 2 '' will be showcased in a four - hour event .
The annual Electronic Entertainment Expo kicks off early in Los Angeles . Nintendo will demonstrate its forthcoming Wii U gaming system . On the software platform for the Xbox 360 , ` ` Halo 2 '' will be showcased in a four - hour event .