I've been reading all this fight, and it does seem that Kabutou has been traped in this genjutsu from the very beggining, the first time the crows appeared, right before Itachi cutting kabuto's horn... And now i have to hand it for Kishi, he found a way to: a) showcase some of kabuto's techniques; b) increase the spam on Uchihas techniques with yet another Doujutsu for the acursed clan; c) keep us from whatching Sasuke's devellopment with the FMS! Readding the fight from the begginig, we can tell a diference in attitude of Sasuke, at the beggining he was much more reckless. And that makes sence if you think that the hole fight was Itachi's doing, Kabuto bellieved he was actually fighting, so he employed all the means availlable to him, but since it was Itachi fighting both for him and Sasuke, he used the techniques he alreaddy knew of Sasuke (i'll try to explain a little better: since all this was a genjutsu cast from Itachi, It was him taking the iniciative from his part and Sasuke's, because Sasuke was a mere spectator, as for Kabuto, since he was caught in a genjutsu, he bellieved he was actually fighting...) But what happens now? Kabuto is aware he is in a genjutsu, what can he do to get free from it?