Board Thread:Theories and Speculation/@comment-25549954-20150524070831/@comment-6769189-20150529005933

The databook says Sasuke got the Rinnegan from Hagoromo, never mentioned that he had Senju cells within him.

There is also no proof that Naruto had all 9 tailed chakras when he spoke to Hagoromo, the 2/3 he was missing didnt show up until halfway through their conversation, implying they initially met before he had all the tailed beast chakra

During the last fight, Naruto used up just about all of the other TB, if not all of it. If it regenerated itself Obito would have kept a small amount of the chakras and would have went whichever beast mode he had at the time. Minato also would have used his 9 Tails mode after he gave up his half of Kurama.

Best case scenario, Naruto has enough of their chakra to communicate with the other beasts, but not enough to use in battle.