Reason why Obito is host for Juubi.
It would be hard for Kishi to portray the Juubi in its perfect form currently.
Too many Shinobi are alive.
Kishi made a nice twist by - Placing Obito in Juubis Host Position.
Since now we can see a fraction of Rikudo Sennins Power - while he was the Jinchuriki for Juubi.
: My ideas what will happen : - Obito will somehow defeat some of the Edos - Via a Rinnegan Path.
Obito will have somewhat strange personality in the upcoming episodes - like 75 % different than he was before - like the Juubi can force its own will upon Obito.
Minato will give the rest of Kuramas Chakra to Naruto - so Naruto will become something of a fraction of Rikudo Sennin - like Obito but Different.
Somehow Naruto manages to bring the fight to a draw - most likely with Sasukes Help.
Madara would take advantage over this Situation.
Madara will use some Hax Jutsu - to make the Juubi go out of controll inside Obito
Juubi will leave the host body and Obito will be very close to death.
But it would be highly unlikely - that Madara will become the host for Juubi.
I dont think , that Kishi will show us 2x of Juubis Jins.
Madara will most def - fight with Hashirama for the last time - Hashi will win.
The Juubi - transforms now to the Perfect state.
Juubi will use somekind of Spore Jutsu - that will put all other Shinobi to Sleep
Now Naruto completely worn out like a rag - takes on the Juubi by Solo
Minato will use hes last remaining chakra to send Naruto and Juubi to a safe location and then says goodbye and fades to dust.
Naruto will fight the Juubi.
Before the fight happens.
Rikudo Sennin will confont Naruto in hes mind.
Then the fight begins,
Naruto defeats the Ultimate Juubi.
and the Juubi is sent back to the Original Parts.
Naruto will then let Kurama go out of hes Body.
But doesnt die.
and so on...^^