Could it be Black zetsu ?

[Chīkara]

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Could he be behind all of this once again, did he leave some of his parts somewhere ? was he the 1 who found Uchiha Shisui's body. Is he Dominating the game once again ?​

 

[loj]

It's Kishimoto himself.

 

[Reflection]

That's what I thought at first. He was behind the Indra and Ashura fights and instigated it all. He said himself that he used the Uchiha as stars for the whole revival of Kaguya. He's using the Uchiha again! Or maybe it's Itachi's son he had with his lover.

 

[Shunsin no Shisui]

BZ is one sneaky bastard. He is hard to kill and even Chojuro failed with his powerful sword. Although I'd hate to think Kishi could bring him back to troll once again. And for God sakes, let Shisui rest in peace. U_U

 

[Alfred Pennyworth]

I don't know..I've always suspected that his upper part could still have been hanging around:

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