I don't think Naruto needs anything other than the Yin portion of the Kyuubi to beat Juubito. I mean, Naruto in Bijuu mode with only half of the Kyuubi's chakra was toying with multiple Bijuu. Secondly, the Juubi isn't even complete, missing the meat of its powers (the Kyuubi and Hachibi). With both halves (Yin and Yang), Naruto should roll Juubito.
Sasuke is going to end up with Rinnegan pretty soon, that's almost given in my opinion.
In theory, Madara shouldn't still outmatched by the 1st, though it seems every so few chapters the 1st gets another accolade of invincibility slipped under his belt, so we won't question the results.
The Specialist, forever
^My first thread.lol