It'll probably be bundled with Smash Bros 3DS.
And isn't this already confirmed by Nintendo? Iwata said the 3DS and Wii U versions of Smash will work with one another, implying the 3DS be used as an optional Wii U controller for that game.
I think even Miyamoto has said in the past that though he can't talk any specifics, that 3DS could theoretically connect to Wii U similar to the GBA/ GCN connectivity.







