Re: Resurrected Itachi
Everyone is forgetting the basis of the technique and what exactly it is.
"(...)The Summoning: Impure World Resurrection is a forbidden technique used to revive the dead. Kabuto Yakushi mentions that Tobirama Senju and Orochimaru were the only ones who knew how to use this technique, and Kabuto now claims to have mastered it to a degree even higher than them. Before the technique can be performed, a living sacrifice must be found. The sacrifice's body is used as a vessel for the soul of whoever is being revived, with dirt and ash encasing them to resemble the original body of the person being resurrected. The end product is stored in a casket until summoned by the user.
When first summoned, the body of the resurrected appears gray and in a state of minor decay. They retain their personality, memories, and all abilities they had in life, including kekkei genkai. However, with the application of a special tag their personalities can be removed, with the extent of this removal being entirely dependent on the individual structure of the particular inserted tag, but whatever the psychological implications their appearance is restored to a closer likeness of how they looked in life. This technique can be used to summon multiple people at once, dependent upon the possession of the necessary amount of live sacrifices and chakra that's needed to summon them. However; as the summoner approaches the limit of the quantity of individuals they can resurrect concurrently, the difficultly in restraining each of the subjects own will becomes increasingly more taxing on the user, often forcing them to resort to the eradication of the personalities of the deceased in order to effectively maintain control.
The revived are impossible to kill by normal means. If a limb is destroyed or removed, it will simply regenerate, and unlike normal summonings the Impure World Resurrection summons can't be dispersed even by killing the summoner. There are only three known methods to defeat the technique: the first is to seal away the soul; the second is to capture the summoner, and use a genjutsu to trick him to canceling the technique; the third is if the bound "soul" is affected in some emotional way that gives the soul closure, like when Shin saw the picture Sai drew of him that he never got to see while he was alive. Once any of these methods is accomplished, the bodies turn back to ash and dust, with the bodies of the individuals sacrificed lying among the ashes. (...)" Source NarutoWikia (and by the way, even if sometimes naruto wikia isn't completly correct, this time it is...
So, itachi will have his eyes, use MS and Sharingan techniques. He will also have his personality.
And the body of the summoned isn't their own. It's a sacrificied body that serves as a vessel for the summoned soul. Don't get confused. It's not that complicated. If the soul was the soul of someone who had Sharingan, the summoned will have it also. And there is no relation to the original body that the summoned one possessed. So, forget about that also.