Theres only 5 theories dat will probably make sense either tobi is really uchiha kagami due to the hair style and his ability of using space time ninjutsu
Orochimaru due to the fact that he is immortal nd an evil geniues nd he prob found a way to escape itachi sword ( the 3 white snakes) nd kishi never showed us his true power since he wuz always sick ns switching bodies nd is also really friendly to saskue
Uchiha izuna he wuz as equally powerful as madara maybe even stronger cuz he speaks greatly of madara nd knws alot about uchiha ancestry nd wuz also around madaras time
Either the so6p maybe he wuznt the good guy we really thought he wuz nd tobi seemed obssessed ovr him he is also obsessed about the juubi and becoming its host it rrly prob is him due to the fact that he gained the rinnegan nd is also a wielder of the sharingan i dobt that he really use hashirama dna on himself he prob tried to gain his power back since he used his last amount of power to create the 9 bijuu nd didnt die on he also used akatsuki to find all bijuu
nd my last theory must be one of the so6p sons
it isnt obito since he wuz a week piece of sh** nd wen finally activated his sharingan he wuz killed by a stupid bolder :flaw:
nd it isnt saskues dad since he wuznt skilled enough to compete with the 4th hokage my biggest theory lies with the so6p
