Kishi doesn't go as straight forward as we think. There is probably a lot more to this, and can't be predicted yet until more is revealed. He must have some relevance to this whole "greater threat than Kaguya". And what about the concern with Uchihas? Who exactly is the younger Shin? Why the same name? What have zetsus got to do with this? How was this army created even before advent of shinobis? And a lot more mysteries...