[j0x]

Originally Posted by Raph

Tobi isn't Obito.
Obito's getting old faster than else would be totally from ass taken.

Spoiler for spoil:

their is Zetsu that has the first hokage cells too and their is Orochimaru that has knowledge and samples of the first hokage cells too, both this 2 are on Akatsuki and can be easily connected on how Obito is treated and become older than Kakashi to be the person we know now as Tobi

so their is a big possibility now on how Tobi having both the blood of the Uchiha and Senju (the first hokage) that is why on chapter 510 he says he is like the Sage of the Six Path that can use the real Izanagi