Board Thread:Naruto Discussions/@comment-24514198-20140604211103/@comment-1586993-20140629224540

Well problem is we still have one more villain to go after her which is Sasuke.

It seems that Kishi is building up him to be the FV since he plans on "tearing down the shinobi system and creating a new one" and "erasing the past" by killing Naruto. I believe Kishi also confirmed that NvS is going to happen which is unlikely until after Kaguya is dealt with.