Quote Originally Posted by AssertnFailure
The rasengan is the incomplete form of the shuriken rasengan. The point is the have a concentrated ball of whirling chakra, and its this core which allows the large shuriken blades to grow out of.

Think of it this way....most wind-chakra attacks we've seen involved the chakra expanding out of the form of something else...ie. Asuma's knuckle blades and Baki's hand. Here the blades use the rasengan to develop their form.
Sounds possible but wouldnt some shurikens made from the same material of asuma's knuckles serve the same purpose? Maybe is a very rare material but I still fail to see all the trouble of making a rasengan and injecting wind just to make a wind shuriken. I'm just judging from one picture, but the shuriken seems pretty normal, isnt wildly spining or doing anything strange.

Maybe when we see it in action it will make much more sense for me, im just an incredulous person.