The juubi is out. Though I don't think it is 100% due to the fact that it only has aportion of the 8 tails n 9 tails power ocorrect me if I am wrong about that statement) however it is still stronger than the kyuubi. But, if naruto combines SM And KM than I would think the combination will be stronger than juubi. Also kurama seems like he has plenty of tricks under his sleeve. Now I wonder how madara and obito will use juubi and what kinda power it has. .