I was eating breakfast and then a cool idea appeared in my mind about the "final villian" of Naruto, rather than Kaguya..what if we still continue with zetsu's betrayal, but not just BZ. Picture this, spiral zetsu pops outta the ground and encases Rikudou Madara within him, and BZ takes over his will, furthering suppressing it more than Obito. How? By enhancing his suppressing willpower abilities with spiral zetsu and taking the sage of the six path's chakra against madara. Don't get me wrong, I thought Kaguya was pretty chill, but she didnt really have a place in the story. Just a fun idea for an alternate ending thing...and it would make more sense in the desire to turn all IT victims into zetsus.