World-building...an origin story for the NV....basically establishing the bigger picture as to why Madara and NaruSasu are fighting each other...Kaguya is cool but she should be to Madara as the Sage was to Naruto and Sasuke. I'll be annoyed if this person introduced like, this year becomes the main villain.We do, actually. She was the original mastermind behind Mugen Tsukuyomi and the originator of the evil of Chakra. And we know that not only does the Juubi have sentience, but Kaguya may very well be the Juubi too. That and she was hyped as being even stronger than Hagoromo.
Why would Kishi write all that for nothing?
Agreeeed...There is a small chance considering kaguya's recent influence on madara.
If madara continues to perform the way he has been then I hope he's not FV.
The reason could be plot, but madara as the juubi jin has been really disappointing.