Masahiro Sakurai, the director of Smash Bros. for the 3DS and Wii U, has confirmed that “the game system itself is complete”. But this doesn’t mean the game is complete. Or is even close to completion. These are the basic foundations of the game that he’s talking about. And, as for his full quote:
The game system itself is complete, so we don’t want to make it 3D or introduce complicated controls just for the sake of it. However, I am thinking of ways we can introduce a slightly different, fun experience all the while keeping the usual frantic game play.
It’s nice that Nintendo is opening up about the game. I thought there was going to be dead-silence for a while longer, so it’s also nice that I was wrong.