...Something just occurred to me. Given the apparent ability to scan figures and put them into the game, what if Nintendo uses that for the Wii U Smash Bros.? Makes sense, given the characters in that series are figurines come to life.
They could sell additional characters as figurines for 5-10 bucks a pop. You scan them once, they're added to the game, and buyers get a nice little collectible. It's genius!