So according to the current 677, unconfirmed spoilers, the Hagaromo's elder son was really his elder brother's son. So the S06P was really Indra's uncle. Also the S06P's elder brother gave Hagaromo his Rinnegan?!?! But getting back to the point of the thread... Sasuke and Naruto are more like cousins than brothers. I'm OK with this as, Sasuke and Itachi's brotherhood should stand alone.