It will get a host, but the juubi won't be here for long because the cycle will just keep going. The juubi can't stay unless it get's talk no jutsu'ed in it's final form so it stops wrecking havoc
Naruto will just split it back into the 7 Bijuu and they will have new forms just like how the Sage predicted
No, I think it will disperse back into the other 7 beasts and a new set of Jinchuriki's will be made, evening them out throughout the villages as an act of peace between the nations of the Ninja World.
Obito will probably be the jinchuukiri for a while. Then Naruto and/or Sasuke will kill him. Or maybe he'll commit suicide. Then the Juubi will be sealed back into the moon.
Either Obito or Naruto, but to set-up for a massive battle between Obito and Naruto, it will be Obito. Then Naruto will win, the Juubi re-released and he'll re-split it into the Bijuu again.