Itachi but if Plot No Justu comes into play Kabumaru will win, then i quit naruto
I say Kabumaru wins. Oro must have developed a way to kill Itachi it must have.
Slaughter by itachi.
Reason being kabuto isnt relying on edo's because he has summoned all the people he can and his trump card is fighting the kages, therefore he would have to fight itachi by himself
Kabuto has plot protection while Itachi doesn't.
The only people who truly have plot protection is naruto and sasuke and even them they have lost fights but have not died.
I wouldnt make sense at all for itachi to lose a 1 v 1 fight to kabuto because of plot. If anything itachi should defeat him, but then kabuto escapes somehow.
Does it make sense that Sasuke survived fighting all 5 kages at once? No. Why did he survive? Because of plot protection. It's too early for Kabuto to die hence the reason for plot protection. The only reason there is a war is because of him. In a fair fight would Itachi win? Yes, but unfortunately there's plot protection in this manga so that won't happen.
As i said only naruto and sasuke truly have plot protection. I know kishi has pulled some petty excuses out of his ass, but i dont think that even him would let itachi lose due to plot.
As i said, kabuto would prolly escape somehow. Or itachi wouldnt even encounter him for all we know. We are just assuming that itachi is going to fight kabuto
Itachi's an edo, which means he's not going to survive forever. Just like all edos he'll eventually be sealed. I wouldn't be surprised if that happens when he fights Kabuto.