Okey guys.. so my theory is .. well naruto gained the full sage of 6 paths mode with kurama's chakra.. so he has full sage mode now.. but for the rinnegan he needs the blood from uchiha.. so my theory is that Sasuke will die in the battle bettwen obito and him and he will give the eyes to naruto like obito did to kakashi.. with the help of sakura it can be done.. she is a medical ninja.. so my theory is.. that when sasuke dies naruto will gain the rinnegan.. or the second theory.. that Obito Uchiha.. comes to the good side against Uchiha Madara and he helps naruto with his uchiha bloodline
~Itachi
~Itachi