Restoration (4k)
You spent all day trying to crank up the protagonist's difficulty, but once they truly endured hardship, rose from the flames, joined forces, and beat you down, you became unhappy about it.
Wu Yu said, "Of course there's no need to kill them. Indra's and Asura's Chakra isn't found only in them. Madara Uchiha and Hashirama Senju are reincarnates whose reincarnation Chakra was activated long ago; their Chakra has already become genuine Indra and Asura Chakra. Add the Chakra of a Nine-Tailed Fox that truly inherited Hagoromo's Ninjutsu Sect ideals, and bringing the Sage of Six Paths back into the world would be effortless! At that point, what difference does it make whether Naruto Uzumaki and Sasuke Uchiha are the ones holding Yang Power and Yin Power?"
As Black Zetsu listened, he pondered carefully. Those words could not have come from someone without a profound understanding of Chakra, the Sage of Six Paths, and the developmental history of the Ninjutsu Sect.
In other words, only Black Zetsu himself, who had watched and personally orchestrated this thousand-year history of shinobi, could have offered such profound insight.
In the future ending he had shown, Mother absorbed the Chakra of every shinobi. Even memories from corners "I" had not seen could be understood by Mother—if he were merely deceiving me, he could have omitted those battlefield scenes that "I" had not experienced in principle—
After Mother was resurrected, she reclaimed "me," and naturally received all that "I" knew—if, at the final moment, Mother truly created this "Gray Mysterious" and sent him upstream through the river of time—then in essence, this "Gray Mysterious" really was more like my blood brother than Hagoromo and Hamura—
Black Zetsu's thoughts raced, but he said nothing. He merely watched the pair of scarlet Rinnegan before him