Masahiro Sakurai, better known as the director of Super Smash Bros. for 3DS / Wii U, has said that "With regard to (Mewtwo), the character is coming along just fine. In fact, it's pretty much done...basically it's almost time." Nintendo announced previously that Mewtwo would be released in Spring 2015 for free to those that bought both Super Smash Bros. for 3DS and Wii U. No details have been released about how players will get Mewtwo if they haven't bought both versions.
Bandai Namco's yearly Global Gamers Day event is coming up on April 9 and 10, so my guess is Mewtwo will be released then or shortly after with an exclusive reveal at said event. Maybe after Mewtwo is released Sakurai can finally have some rest, but I doubt Nintendo will ever let that happen.
Sakurai: Mewtwo DLC release will not be delayed [Event Hubs]... read more