Re: Madara and shisui
what we know, is that Danzo had shusui's right eye, and Tobi only shows his right sharingan.
Shusui is supposedly dead, yet this too we can not be sure of. Perhaps shusui's using a sharingan from one of the slain uchihas??
Danzo said he saw tobi(madara) at the uchiha massacre.
Itachi said "Madara" helped him massacre the Uchiha clan, but can we be sure that itachi actually killed the uchiha's?
I suggest forgetting what tobi has said. He said the 9-tails attack was a natural disaster and had nothing to do with the uchiha's, yet he is the one who instigated it. IF tobi is Madara Uchiha then the Uchiha clan was involved. it isn't THAT large of a leap to assume somebody was able to at least leave a message that the one who attacked had a sharingan. Or somebody else see the sharingan, like a hyuga maybe?
He also said Itachi slaughtered the Uchiha because they were planning to overthrow the hokage. IF that were true, why would Madara Uchiha help him and not his clan? IF the Uchiha planned to become what Madara had wanted them to be all along, why would he stop them, or help stop them?
Somehow, tobi has access to a rinnengan, and he did say that the tome in the uchiha shrine required a sharingan to read the 1st third, a MS to read the 2nd third, and a Rinnenegan to read the last third. So perhaps a sharingan can evolve past MS into a rinnenegan?
If that is the case, and rinnenegan users are truely outside the realm of life and death, that would explain how he survived so long.
I still don't think tobi is madara uchiha however. Shusui maybe, but even that seems a bit weak.