I have a feeling.

[eyesofthekyuubi44]

The Kyuubi will not become good, its most likely like Valkyria said, the foul, limitless chakra of the Juubi. The Hachibi was probably whatever "good" chakra the Juubi had, thats is why it is "good". The Kyuubi probably inherited the near limitless chakra of the Juubi, as probably not even the Juubi had limitless chakra.

 

[ninryu]

i don't thinks naruto can turn kyuubi into good, maybe he'll defeat him or control him.