First I would like to start off by saying nagato rinnagun was originally madara's. Here is how I came to this conclusion. Tobi claim to be madara until kabuto revived him. When nagato died bring everyone back to life from konoha tobi (pretending to be madara) says he was supposed to bring him back to life. When madara was resurrected by kabuto he says nagato had finally grown up.
Next I believe tobi killed madara. The only reason I believe this is madara knows of tobi exist and he didn't seem that thrill to know he was behind what was happening. I can't really prove it but i have a good feeling that's its a possibility.
Finally tobi is izuna uchiha. I know alot of u are thinking that izuna was shown dead in a coffin. Well i think that izuna was a fake. Izuna was suppose to be madara equal or at least very close to it. If that is the case I don't think izuna would willingly give up his eyes so his brother can keep his power. I think itachi was right n madara took his eyes by force. But i believe izuna took the eyes of another uchiha n went into hiding and disguise himself as tobi. If this is true that would explain why tobi has never been seen using a ms even tho he knows all about it n their abilities. He has to be an uchiha tho just for the simple fact he can using izangi. Itachi also says tobi(pretending to be madara) was a shell of his former self which would be true if he doesn't have his original eyes, but he would still be an elite ninja.
only thing i dont see u explaining in how tobi can
be izuna and still be so young looking with black
hair and almost no wrinkles from what we have seen
of his face from the fight against konan. He lived
about 100 years ago so how is he alive and looking
the way he does?
Not bad at all...Sounds like my assumptions
though...LoL...But,think back,how did Madara took
Izuna eye by force if his own eye already
blinded?...I mean,did you really think Madara will
survive a fight with his blinded eye against Izuna
mangekyou sharingan?...I think,Izuna gave his eye
to Madara and fake his own death in order to gain
trust from his clan members for his
brother,Madara...With EMS in Madara eye,the
genjutsu also much more upgraded...Then,with his
EMS,Madara took control over someone from Uchiha
clan members by using the genjutsu,maybe Tsukuyomi
and took his sharingan and transplanted it in
Izuna eye...Maybe,Izuna want his eye back and
Madara don't want to give it...So,Izuna just
followed Madara plan and wait until the time is
come...But,Madara gave it to Nagato
instead...Izuna(Tobi) not dare enough to take
Nagato's rinnegan...What chance that he has
to fight againts the rinnegan...So,he meet up with
Yahiko alone and told him to form an Akatsuki...In
that way,he can keep his eye on Nagato and make
some research on rinnegan abilities...But,the
point is,if Nagato rinnegan was transplanted from
Madara's rinnegan,it's Izuna eye after
all,he gave it to Madara...
What you said makes alot of sense. And I always
wondered how an elite ninja like Izuna, on par
with Madara and also his loving brother could just
die off and Kishi not give any story or background
information on how Madara could have done such a
thing to him. In any case I think Izunas body and
looks has been preserved from now having a body
like zetsu, someone was saying we saw his face he
is supposed to be over a hundred years old well
not having a human body could explain that. In any
case your ideas about Izuna's the switching
of the eyes makes since so all in all good blog my
i dont agree with any of it well some of it.
madara new of tobis plan. infact he even goes as
far and saying do u know our plan as well. then
kabuto says not in detail but i am on ur side.
though i am unsure if the fake madara will act as
planned. so that means they where working together
before his death and they came up with a plan
together. madara even knew it was tobis that had
to do with him being brought back to life. well at
least the war part.
tobi is a good
medical ninja he is probably the one who fused the
1st dna with madara. and help him come up with
this plan. then madara died and the planned on
passing the eyes to nagato so he could bring
madara back to life.
i am sure if tobi
is isuna madara would know it. and wouldnt get
snuck and killed