the Sage if Six Paths is not coming back from the dead.
What evidence do you have to support that?
My evidence that he will return is little but i have some:
Recently he has be mention alot which normaly in any t.v , book or anything that isnt boring means he will make a appearance.
Naruto is in my mind 100% the rincarnation of the so6p's as he is the hero and hero's are always the cool guy. his kyubi mode even looks like the so6p's.
Toad says " he is the child of prophecy" which was to be the one who would make peace like the sage wanted and my theory is that when naruto acheves this the sage will make a appeance.
The six coffin could be the sage ? which means he is now alive.
These are all semi facts that support that the sage is alive in one way or another be it through edo tensei , naruto's spirt , a prophecy or his actual body. Much more suggests he will make a appearance than saying he won'y so show me some eviedence to support your claim