Guy didja read the last chapter?
Cuz funny thing is what you just wrote about that last one is happening right now and here are the results:
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So your defense is pretty much rinnegan on the first two right? well here:
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As for the last one well, if it was the time in the forest where Naruto was given Koto, at that time if Itachi had been a bad guy for reallzzz than there would be no more Naruto. But eventually, yes you are right, Naruto will be stronger and so will Sasuke.