Sakurai: "Next SUPER SMASH BROS. Will Need Dual Support for 3DS and Wii U"

Masahiro Sakurai, one of the more younger up and coming talents from camp Nintendo, and recent director of Project Sora, otherwise known as Kid Icarus: Uprising, was recently caught by IGN noting the challenges in innovating in sequels of the popular Smash Bros. franchise:

"As you noted, there is a certain dead end we come to if we just expand the volume of the game."

Most of the Smash Bros. games have been, for the most part, the exact same thing with the exception of Brawl which introduced the Subspace Emmisary mode, which despite shaking things up was pretty useless. While some might argue that it was a feature that gave us a reason to all the fighting I truly believe it's something that players could've easily done with out, myself included.

But what does Sakurai have up his sleeve for the next (two) iterations of the Nintendo fighters?

"I intend to change direction a little as we go. The key to that's going to be its dual support for 3DS/Wii U." 

During last year's E3 it was made a point that the next Smash Bros. would not simply be a console affair but would also have a handheld counterpart on the 3DS. Apparently, Sakurai wants to create some sort of connectivity between the two that links your fighting profile on both systems so that experience you gain in one will transfer over to the other. Think transfarring, y'know, Kojima style. 

What sort of features do you think a Wii U and 3DS Smash title will share?