Naruto probably will get the rinnegan since he will be the new SO6p and is the inheritor of his will. The Sage had it and he probably will have it too. I don't think he will have it all of the time though like Nagato had it since those were Madara's eyes. I think maybe he will have it when he turns on Sage mode. I'm not sure Kishi wants to change his looks much. He's pretty much looked the same since he was little.
He and Obito were in each others minds so Obito knew which chakra was missing, which is why he only pulled out part of the one tail and eight tails.
As for whatever power ups Sasuke gets I think they will compliment Naruto's so one will not be able to beat the other. If and when they do fight they will either both die or they will both be badly wounded. They will be on an even field so that when all is said and done they will have to work together for the good of the village. Which is what went wrong with the Sage's sons and Hashi and Madara. Righting the wrongs of the past is part of what Naruto is supposed to be about.
He and Obito were in each others minds so Obito knew which chakra was missing, which is why he only pulled out part of the one tail and eight tails.
As for whatever power ups Sasuke gets I think they will compliment Naruto's so one will not be able to beat the other. If and when they do fight they will either both die or they will both be badly wounded. They will be on an even field so that when all is said and done they will have to work together for the good of the village. Which is what went wrong with the Sage's sons and Hashi and Madara. Righting the wrongs of the past is part of what Naruto is supposed to be about.