EDIT well that will teach me to combine a long week at work with posting answers on here
CONFIRMED DISNEY INFINITY supports 2 player co-op play in "Play Set" mode, and up to 4 players via local or network online play in "Toy Box" mode for HD consoles (Xbox 360, PlayStation3, and Wii U). Enjoy 2 player co-op play in "Toy Box" mode on the Nintendo Wii.
... sincere apologies for any excitement or confusion caused