Soundwave on 22 March 2013
Just my guess, but I think Nintendo learned their lesson with NSMB2/NSMBU, the Wii U needs Smash Brothers a heckuva lot more than the 3DS does, so Smash Bros. U will probably come out first on Wii U, then 3DS later in 2014.
I'm thinking SSBU for Wii U in April 2014 and then SSB3D for 3DS in November/December 2014.
I think Square-Enix is going to start to roll out more Final Fantasy remakes on 3DS this fall in Japan too.
I think Next Level Games doing Luigi's Mansion for Wii U and Punch-Out! for 3DS makes a lot of sense now too.
