Do you think once Kaguya gets TNJ, you think Black Zetsu will get angry and ask him self if all this was for nothing and goes on a rampage to become the final villian
Nah. I think that Kaguya is the final villain. Kaguya won't get TNJ'd either. She isn't like Obito, or even Madara. The only one that could TNJ her would be her two sons.