First, at least a couple things are confirmed. 1: Nagato's Rinnegan came from Madara. Which makes sense as to where they came from to begin with since Madara was able to awaken them. 2: Obito is fused with Zetsu aka Hashirama's artificial body. Probably explains Zetsu's origin too.
I originally thought Tobi was Obito in the very beginning, however there were way too many things wrong with that picture. The main being, Obito was still a kid, like Kakashi when "Tobi" fought Minato and unleashed Kurama on Konoha... But clearly I was wrong. Then thinking Ok, Obito became Madara's disciple and it was really Madara who fought Minato.. but as the latest chapter reveals, Madara is old as dirt. So it couldnt be Madara, Obito is still a kid.. but clearly Tobi was using Kamui in his fight with Minato.. SOO WTF? This is kind of a huge plot hole and makes absolutely No sense what so ever... Unless There is going to be some stupid DBZ Time traveling bullshit, i dont see how any of it will make sense... I think Kishi effed up and is trying to figure out how to fix it. heh..
Not a plot hole at all. The attack on Konoha took
place several years after Obito was injured - by
then he would have been in his late teens. He
would have grown to adult size by then. As for how
strong he is, we've seen that a person can
easily go from a complete idiot to a savvy ninja
in a relatively short time period, as evidenced by
Naruto himself. It's completely possible that
the Tobi who attacked Konoha is still Obito.
umm... Obito is around the same age as Kakashi
and Guy... during then, they were not allowed to
fight and if you look at that chapter, they were
clearly all still kids... How would Obito be
almost fully grown if Kakashi, Guy and the Rest
even so that still proves my point.. obito was
wayy to young to have fought Minato and set the
fox on Konoha... Yet Tobi CLEARLY was using Kamui
during that fight, which is how he gained the
edge.. Thats what i cant figure out that makes
umm... Obito is around the same age as Kakashi and
Guy... during then, they were not allowed to fight
and if you look at that chapter, they were clearly
all still kids... How would Obito be almost fully
grown if Kakashi, Guy and the Rest arent?
If you go back to the chapter where Tobi battled
the 4th Kakashi & Guy were alot taller then
they were when obito died