After rewatching and reliving the Kabuto vs Itachi/Sasuke fight.
It's clear Sasuke was completely in the way the entire fight.. Itachi used susanoo to protect Sasuke instead of himself. lulz..
Also if you notice Kabuto was doing his best to turn Sasuke against Solo king cause he knew he could not beat him. I know this post will make the haters Irate but let's face it. Kabuto knew he could not beat solo king so he played every dirty trick in the book to try and beat him.
Dat Solo King
Wrong, Sasuke being there saved Itachi from losing, Itachi said himself that he protected Sasuke because he knew that's where Kabuto would go after and the sound jutsu took down Susanoo but Itachi was able to make an arm with all the strength he could muster even with the sound. IT no Sasuke then Kabuto could attack Itachi from any direction. Also Itachi
Needed Sasuke to break out of Kabuto's sound genjutsu. Kabuto could have started the fight out with this Genjutsu after going SM. So no Sasuke equal Itachi being taken control of.
Kabuto only needed to do this, Sound jutsu to take down Susanoo (
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), Then this jutsu to control nonliving things to impale Itachi who couldn't even see due to the light (
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), then He could just overwrite Itachi's mind. If anything the Sound he Jutsu (
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).
As you can see, Kabuto have the jutsu and power to beat Itachi if Itachi was alone.