What if naruto's next power up getting the other half of the kyuubi chakra allows him to temporarily summon and utilize the power of the other tailed beasts:ls:
I think his next power up wont come until he gets hachibis chakra. Then, I can see him being able to summon all the tailed beasts. If he gets the rest of kuramas chakra, he will probably just get a massive strength/chakra reserve increase.
Seeing how yin is spiritual and the bijuu probably transferred part of there spirit as well as there chakra into naruto a large enough power source would allow them to partially and temporarily manifest.
I think that inside naruto is like a save file of the different juubi and this will allow naruto with the help of the So6P to recreate the bijuu after the juubi has been defeated.