Obito turning into the Jinchuuriki was a plot itself... he hadn't the means, he was exhausted after all the war and the fight with Kakashi, he almost didn't get any lifeforce left after transfering lifeforce on its jutsu... becoming Jinchuuriki was all a plot. The only way to achieve that would be the Juubi entering into Obito by its own will.The dude Is now the Juubi's Jinchuuriki and Still wields Kamui and the Rinnegan.
Logically, No one in the narutoverse can stop obito except the sage at this point, Even madara pales in comparison.
It will take some major plot to take him down Lol