Nintendo is now saying that the Wii U can support more than one Wii U controller but they are to expensive to sell on their own. They are also telling developers to make games that will support one Wii U controller.
my suspicion is they designed the wiiu controller to be a unique experience, and that they'll be catering more towards "classic pro gamepads" as the traditional controller for "hardcore gamers". that would address all issues, including cost.
