Cool thinking bro. That would be great, though i don't think Naruto gets the rinnegan...(it'd be a little unfair to Sasuke in my opinion). Naruto's power hasn't even been scratched yet. I think he could break mugen tsukuyomi by virtue of possessing the power of the rikudou
It's an interesting theory, but i don't think it's gonna happen. I think Naruto will not get caught in the Mugen Tsukiyomi simply because of the Sage Mode (The connection with Nature and adding the Bijuu chakra and Rikudou Sage Mode make Naruto immune to Genjutsu) or the gudoudama negate it being the "Truth-Seeking Balls" it would protect someone from Genjutsu "illusions" That would fit don't you think.