This all goes off the question, is it possible for a person to be incartnated by two people at once.
If so then naruto may have the sage's younger son aka the uzumaki ancestor may also be the incartnating naruto.
Another thing is this twist i thought. What if the hyuuga ancestor was actually the elder daghter which is now incartnating hinata probably. a long shot i know.
and this is just a side question, do you think the sage's brother had the renagan