http://ds.ign.com/articles/122/1223789p1.html
"As you noted, there is a certain dead end we come to if we just expand the volume of the game," Sakurai told me in a recent e-mail interview, clearly recognizing that simply adding more characters, items and stages wouldn't be enough. The Smash Bros. franchise, though repeatedly earning high praise from critics over its three entries, has effectively followed the same formula since its inception, evolving its style of play without shaking things up too much. So if merely expanding the idea isn't the only thing on Sakurai's mind... what is?
"I intend to change direction a little as we go," Sakurai said, indicating his desire to possibly find a new mechanic or idea to drive two new entries in the series. "The key to that's going to be its dual support for 3DS/Wii U."
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