The intentionally vague game lineup would be something like this:

• New Mario Game for WiiU (maybe connection with 3DS Mario?)
• Pikmin 3 unveil
• Wii Sports is to Wii as (new title announced here) is to WiiU (casual appeal, tech demo showing off controller and system capabilities)
• Third Party exclusive unveil (even if its just some dance game)
• At least one third party multiplat being shown to highlight the WiiU's unique capabilities, Aliens Colonial Marines or maybe something from Ubisoft?
• At least one new game teased either through a teaser trailer or mixed in with a larger gameplay/trailer montage.