It looks like the wizards at Nintendo are going to be doing DLC for Smash after all, for both the 3DS and Wii U versions of Smash Bros! You know what that means!
Mewtwo won't be available until next year, which is explained by reaffirming that new characters take a long time to make. Be sure to watch the rest of the video too, it's got tons of awesome stuff!
One last thing, the Lylat Cruise stage that originally appeared in Super Smash Bros. Brawl will be re-appearing here in the Wii U version, which will no-doubt contain the secret Star Fox taunts.