I don't see why he would become stronger than the So6P?
For one Naruto is Uzumaki, and a decedent of one of the sages sons(younger son). Now the younger son who was said to possess the body of the sage is still not as strong as the sage himself because he is incomplete without the sages eyes.
The way I look at it, Naruto may be destined to harbor the power of the 9 bijuu but it doesn't necessarily mean he'll be stronger than the sage himself.
Naruto doesn't possess the sages eyes, so I don't think he CAN be stronger than him, maybe pretty close though.
For one Naruto is Uzumaki, and a decedent of one of the sages sons(younger son). Now the younger son who was said to possess the body of the sage is still not as strong as the sage himself because he is incomplete without the sages eyes.
The way I look at it, Naruto may be destined to harbor the power of the 9 bijuu but it doesn't necessarily mean he'll be stronger than the sage himself.
Naruto doesn't possess the sages eyes, so I don't think he CAN be stronger than him, maybe pretty close though.