Board Thread:Theories and Speculation/@comment-30241447-20180919062520/@comment-5407586-20180919160310

Sasuke being caught by Kotoamatsukami would've happened only if Naruto hadn't met Edo Itachi. But in that case, with Itachi and Nagato roaming around the battlefield, the Allied Forces would've been screwed. Kabuto summoned Madara only after losing Nagato and Itachi, which hints at how highly Kabuto thought of them. Being reanimated, Itachi could spam Tsukuyomi, Amaterasu and Susanoo, while Nagato could create stars left and right. That's a pretty dark scenario for the good guys (Itachi even commented on how the two of them together were almost omnipotent).

Back to the topic, Sasuke would've fallen for the genjutsu hook, line and sinker. Even if he himself noticed that something was amiss, he wouldn't be able to do anything about it. A genjutsu that overwrites even Kabuto's control of Edo Tensei is that strong. It would've been funny to see Sasuke screaming "I'll kill you" and then say "I'll protect Konoha".