I mean honestly the fact that naruto has already dealt with the rinnegan before via nagato, that knowledge and experience will help him against sasuke if he were to obtain the rinnegan? I honestly dont see the rinnegan being a deal for sasuke as many others make it out to be.
Just my opinion.
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Oh shit, Prince.. You don't want this.
Lol, if we remove Obvious plot armor... Rinnegan would be naruto's worst nightmare. A rinnegan Sasuke would be > 50% BSM naruto, naruto would need the other half. Why?
check it. NAgato has shown us that many path abilities can be used at once. So, not only can sasuke summon aoda, but he can now summon the pterodactyl, cerbus, the bull, the chameleon, etc to completely overwhelm naruto's Summoning arsenal No diff.
Then, we have asura path and Sasuke's Raiton and enton mastery. That's 4 potential arms sasuke would have, one has raiton kusanagi, another 2 have enton sword and one has chidori lance. That's 4 swords in sasuke's hands, and we all know he's a very skilled kenjutsu user. That's incredibly OP in CQC especially with EMS perception and rinnegan linked vision. Naruto's speed advantage would be drastically lowered since sasuke could predict his Chakra paths.
Then we can also add in Preta here for any and all surprise chakra based attacks. Chakra arms, all Rasenshuriken, etc, instantly become utterly useless - And sasuke would still have 2 sword weilding arms free to defend himself along with them summonings.
ONTOP of that, he then has ST and BT to manipulate naruto's movements. If he tosses a shuriken and naruto tries to dodge? He can BT naruto to slow down his movements so the shuriken can hit. Or, use ST if naruto uses a speed blitz he couldn't see to slow down naruto. That way he can clock in on where naruto is (linked vision + EMS)
That's not all folks, we also have naraka path's healing and it's invisible
king of hell. As long as
king of hell is not interrogating anyone, sasuke has 2 invisible summonings up(chameleon and
king of hell) to prevent any flank attacks by naruto.
Now, that's
just rinnegan (bar gedo mazu, human path and CT). LEt's go to EMS now!!! Sasuke has genjutsu which
does affect perfect jins for a second at a time to paralyse them. That mins sasuke has mins to slow down naruto's movements a second at a time.
But, wait, Let's go to the real EMS powerhouse. Madara has shown us that EMS moves(susano'o) can be used with rinnegan. That means, sasuke could have up a V4 susano'o which could be tossing enton magatama's, using enton swords and arrows, while he has 6+ Summonings out, and Asura, preta and Deva path waiting at his disposal. Even naruto's BM's and BM barrages would become a bit useless. Sasuke would have a plethora of ways to deal with them, especially ones not infused with SM chakra.
Ways to deal with TBB;
1) Tank is With V4 susano'o - More possible for a single, non SM enhanced TBB, than SM enhanced one.
2) use Asura and deva paths to move quickly to dodge the TBB
3) Use Cerebus to tank a Tbb
4) USe preta in conjunction with Susano'o to form a high level defence while he absorbs the TBB.
5) Use CT to pull all tbb's straight to the core, effectively allowing sasuke to dodge them without moving an inch
6) Use genjutsu to paralyse naruto for a second to break his concentration on the TBB and mess up the ratios
7) Use a CST to possibly change the trajectory of the tbb
OF course, a few of these would work better on TBB, or TBB barrage, or sage TBB, than any other tbb.
TL;DR; Naruto would be ****ed. The landscape would be destroyed. And sasuke would most likely only lose due to chakra loss.