It's been confirmed on shacknews.com that only 1 Wii U controller works with the new console and you can't buy the controller seperate either! Ouch..... Ultimate fail for a system that's targeted toward "Family use"...
A spokesperson told CVG that the console and controller are sold as one unit. "You won't be able to buy the controller alone," he said. The system is only designed to support one of the tablets, while multiplayer games will have others playing asynchronously with Wii remotes.