Plus, Hashirama has already been brought back by Oro. It would be kinda repetative to bring him back again. If Kabuto had Yondaime in there that'd be nice. He should be able to fight on par with Madara as well.
And I want to see Sasuke's reaction once he finds out that Itachi is now used as a puppet.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"