i believe that the sage of 6 paths being naruto is kinda bad idea
he is the child of prophecy or something like that.
firstly this story is unpredictable anything can happen any moment
earlier naruto sasuke and sakura were the apprentices of the 3 legendary sanins
giraya orochimaru and tsunade and was thought to be revolved around it.
however later the story was manupulated.
sasuke represented frst uchiha ie. madara and naruto was like frst <stated in the manga> who were the decendents of the actual sons of so6p
now if naruto turns into so6p again the concept will be ruined and i think this is not pretty possible...........
also as madara 1st hokage could also control the jinchurikis without the sharingan.............
so my guess is that madara/tobi will successfully make the jubi however will nt be able to control him cause of his weakness or somethiong or may be get engulfed by it or something like that
however sasuke <having the ems> and naruto <may have unlocked the ability that 1st hokage had> together will successfully stop the jubi obviously will end up near dead........... and i believe that tsunade will die saving naruto cause
frstly none of her team mates or teacher ale alive so no reason to live and she found an image of her brother and boy friend in him <found that weird>
also that untill she is the hokage and is alive naruto wont become hokage i guess............ so she might end up using re animation jutsu or some other jutsu she might have created in the sorrow of his bro or boy frnd i mean she is the LEGENDARY sannin
such techniques must nt be new to her
P.S. this is jst a thought so dont crap on it specially Schmack