Fūton: Rasenshuriken

Prior to Naruto's inclusion in Super Smash Flash 2, it was mistakenly believed that the Fūton: Rasenshuriken (風遁・螺旋手裏剣, Wind Release: Spiraling Shuriken) would be his Side Special Move. Naruto would have summoned two Kage Bunshins to form a giant Rasengan in his hands. Afterwards, one clone kicks in front of him and Naruto would throw the projectile. According to the Flash2Dojo, the fan DOJO!!, the projectile would have had infinite range, but would have been nownere near as powerful as the regular Rasengan.

Trivia

 * In both the manga and anime, using the Rasenshuriken deals intense cellular damage to Naruto's arms and hands, but it's unlikely that this would have transferred over to SSF2.