In a press released in regards to Sonic & All-Stars Racing Transformed, SEGA has suggested that the Wii U will launch in November, stating that the game:
…will be available on the Xbox 360, PlayStation 3, PlayStation Vita, the Nintendo 3DS, Nintendo’s Wii U, and Windows PC Digital Download this November.
But this doesn’t seem like a surprise to me. I’m not sure when else the Wii U could launch. It’s coming out this year and October seems pointlessly early when Christmas would be so close.