After what they did to counter the GTAIV release, I believe the Wii supply could easily go up, as in, they are stocking up for holliday.
Also, even if they DIDN'T announce titles (which won't happen) Nintendo would pretty much still be on top compared to the PS3 and 360 through the Hollidays.
It all really comes down to how many Wiis Nintendo stocks up. Last Holliday they were sold out and look how many they sold?








