Quote Originally Posted by kAi

Rasengan is basically a wind techinque already, but he'll probably figure out a way to throw it or something, otherwise all I see is it getting bigger. I can also see Naruto coming up with an ultimate defense later on, similar to Kaiten except without the spinning, just the wind spinning around him.

Don't you remember the chapter where Naruto performed "Oodama (sp?) Rasengan?"

Basically it was a huge, fucking Rasengan.

And as another poster said, he already threw the Rasengan in a filler, so both of your theories are bunk.