There's something everyone is forgetting, i quote ''its being prepared'' (SUISHI's EYE)
1. Senju DNA + suishi's = quick recharge.
2. Itachi (an edo) made from senju's dna+suishi's eye= Izanami
my guess is its been prepared means suishi's eye was recharging and its the key to Izanami since his eye (suishi) posseses the ultimate genjustu.
PREDICTION. Itachi screams ''Izanami'' suishi's eye activates and kabuto is under a superior genjustu but doesnt realise his under one cos thats what suishi's eye does. Kabuto battles hard against itachi and sasuke stabs itachi to the ground, itachi turns to sasuke and says ''why? my silly little brother'' sasuke shouts back ''you are no brother of mine, just a liar and a murderer'' kabuto proceeds to capture itachi and rewrite the justu and control him again. He makes a seal to retake itachi's mind and itachi turns to crows and fly away. Kabuto's body stopped and he cant move. ''whatts going on?'' kabuto asked, itachi appears in his front and says '' i'll tell you, thats the power of izanami the ultimate genjustu that reverses any justu u try to use on the caster, using suishi' eye you didnt know when were already under genjustu and your destiny was decided for you. You are now under my will like i was once under yours'' kabuto screams in anger ''damn you itachi, you are just a dead man and sasuke kun why arent you helping me?'' itachi replies ''oh about that, sorry sasuke i had to put you too under the genjustu to be able to fool kabuto properly'' sasuke looking shocked speaks ''a genjustu that i cant see through even with my EMS?'' itachi replies ''its not just any sharinga its suishi's eye the power of that eye was so great, its a pity the eye has just lost its light.''