The 8GB is gonna be gone. 32GB only starting in the summer/fall, whenever they clear out whats left of that Basic inventory.
My guess is $279.99 + Nintendo Land in white or black + free Zelda: Wind Waker download if you buy a Wii U through Christmas.
Kinda similar to what they did with the GameCube back in the day, it was $149.99 plus you could get a free copy of your choice of a few games (either 1 of Metroid Prime, Super Mario Sunshine, Animal Crossing, IIRC etc.) for a limited time.