Things leading me to think this is real:
1. This is the same eye that the juubi has, which would make sense since he has the chakra of all bijus.
2. He's the successor to the sage of 6 paths, so getting something like rinnegan is going to happen, it's just a matter of when.(personally, I think it should be at the end once Sasuke and Naruto settle their differences)
3. He has the Sage's chakra running inside of him.
4. I don't think I've seen a panel of Naruto with that expression with his collar untied before.
Things leading me to think this is fake:
1. Naruto's attempting to stop 4 biju damas. That's a power issue, not visual issue.
2. This would make the distance between Naruto and Sasuke's power light years, making their rivalry uninteresting unless Sasuke gets a major and, most likely, random buff.
3. Obito's eyes haven't changed like this even though he's the juubi's jinchuriki in second form. For something like this to happen, Naruto would have to be a better jinchuriki or something.
If this is a fake, it's one good fake.