Board Thread:Naruto Discussions/@comment-11276487-20140818181748/@comment-945885-20141023144458

I doubt that Kaguya and Black Zetsu will be directly involved since they're trapped and sealed in another dimension, but the moon coming down seems like it has to be somehow connected to Hagoromo, Hamura, and Kaguya, since they originally created the moon to seal her.

Guruguru is still MIA, of course, so there's a decent possibility that he'll act as a catalyst for the movie's plot, assuming something doesn't happen to him in the final two chapters.