I think that this new move of his wont work out.
Why? Kazaku still has two hearts left. Lets say that Naruto lands this new skil on him and takes out 1 of Kazaku's hearts. Naruto didnt look like he wasted lots of chakra/tired from making that new move, so he should be able to make another one. If one works to take out one of Kazaku's hearts, another wind rasengan should be used to take out another right? Wrong, Kishi doesnt make his manga material that boring. My prediction is that, Naruto's new move, because it is still imcomplete, will not take out Kazaku's hearts. Naruto and the gang work desperately together to take out 1 of Kazaku's hearts, and for the last heart, Naruto "finalizes" the move in battle and take out the last one, thus having a grand ending and awesome achievement-type-of-feeling that Kishi might write