Its possible...
Think of it like this:
This is a theory I have. You all remember how the Tailed Beasts each gave Naruto some of their Chakra? I believe that in some way, not the Juubi itself, but a Juubi incarnate will be apart of Naruto since he has the majority of the Tailed Beast's chakra (Which is obviously needed to revive the Juubi itself) which will allow him to unlock the Rinnegan. He will still have Kurama since its not the actual Juubi inside him, just the combined consensus of the actual Tailed Beasts.
Then Sasuke, assuming he will get the Rinnegan, has his EMS. Naruto has his Chakra+Rinnegan whereas Sasuke has the Rinnegan and all of his EMS techniques that are spammable and Perfect Susano+Amaterasu fireballs.....
IMO, that evens it out since if only one of them gets it, it would be unfair to the other.
In simpler terms: Naruto and Kurama+Rinnegan= The SO6P incarnate with more firepower
Sasuke and EMS+Rinnegan= More versatility overall
It would make them both arguably the strongest in the series at that point. Would probably be an enjoyable battle as well.