Do you think, if Naruto get the Dark Kurama he will be able to defeated Madara with Sasuke ?
I do not think it will makes sense, because he will not power up.
This.... AND btw why would Minato sacrifies himself and give Naruto the dark Kurama during the kyuubi attack for 16 years ago? I mean it makes no sense because Minato's plan was to let Naruto control Kurama's yang chakra no Yin chakra only because he stated it was better to keep it away.