Im not what you are scared about because the manga has made it very clear that nobody's power will rival the sage. Look at it this way, i believe after the older son got what is behind the rennigan, he fought the younger son and experienced a near death moment which allowed him the activate the rennigan. But obviously although a rennigan, the sage's rennigan was superior than his.no way fit? he can absurb naruto's chakra and be young again.
he can get mechanical limbs which can help him walk or move.
he can use deva path abilities to levitate around and move like onoki
use pretha path to absurb naruto's ninjutsu
imo bm naruto right now would even have a touch time against nagato.
how is gedo mazo tobi's? didnt nagato use it once before against hanzo and his men so most likely if sasuke gets rinnegan he will be able to summon gedo mazo.
''Once Sasuke unlocked MS what we usually see is Amaterasu, Susanoo, and Genjutsu. I'm betting that once Sasuke gets Rinnegan Kishi will only have him use the most hax jutsu's in his arsenal.''
no.
ems and rinnegan would be too hax
Similarly,we saw that nagato said that his rennigan ability (chibaku tensei), is nothing compared to the sage's which sealed the 10 tails;
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Similarly even edo madara's rennigan ability was called a fragment;
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Thats what im saying, the bloodline thinned therefore even if you were to activate the rennigan, you wouldnt be able to do what the sage did. Basically the sage's rennigan > older brothers rennigan (yes i believe he later activated it) > madara rennigan (this includes nagato, since its been confirmed that he gave it to him)