Board Thread:Versus Debates/@comment-26636534-20170822151908/@comment-25122992-20170825192848

Sasuke couldn't be controlled by Itachi via genjutsu anymore, it was useless. Otherwise, Itachi would've used one of his own genjutsu instead of preparing Shisui's Kotoamatsukami, the most powerful mind-controlling genjutsu in existence, for the case if Sasuke turned against Konoha.