Quote Originally Posted by animus View Post
Naruto's form is like some Spirit Oni form or something? Reminds me of something, but I can't recall.
The shroud looks like the Sage of the Six Paths. The shroud even wears the same necklace and gives Naruto horns, like the Sage had.

http://naruto.wikia.com/wiki/Sage_of_the_Six_Paths
http://images2.wikia.nocookie.net/__..._Six_Paths.png

So I really don't think Sage Mode is redundant. He was in Sage Mode when he "captured" the Kyuubi. I think this form is Kyuubi + Sage Mode. And it makes him closer to the original Sage of the Six Paths than anyone, except maybe Pein.