What is Nintendo announcing September 13?

Nintendo has sent out invites to an event for September 13 that's being held in New York City. On the surface it sounds like another chance for lucky industry insiders to play Wii U games early, but the timing points to something more. Wii U is supposedly coming out this year, but we still know so little about it. If the system will actually be on sale this holiday season, consumers will need some concrete details. Will Nintendo finally share its Wii U secrets with the public?

More importantly, what do you think Nintendo will announce next month in NYC? Let us know in this handy poll and explain your reasoning in the comments!

What will be announced?