Re: *SPOILER* Couple of reasons/believable guesses why Tobi is the Elder Son of SOT6P
As I mentioned earlier in the thread, perhaps him teleporting himself into his own realm, "Yomi" I predict it will be called, is why he lost all his power, if you're inactive for so long you loose your prowess, or maybe something we don't know happened, maybe something crazy like Itachi tried to kill him, and get rid of his eyes happened... who knows?It's definitely an interesting argument... but if the elder son had the rinnegan (or something similar), why wouldn't tobi? he had to get those eyes from nagato first -- which doesn't really make sense if he was the elder son. At one point we've clearly seen a sharingan in tobi's left eye, indicating that at that time *both* his eyes were sharingan.