Board Thread:Theories and Speculation/@comment-25139119-20150407042157/@comment-24808887-20150407154106

@Legendary Super Saiya-Jin 4 - DB(Last) stated that Hamura decided to guard GM and Hagoromo spread ninshu(beginning of missionary) - creating of TBs hapened later when ninshu was already big enough to have successor feud, this fact alone disregards your suggestion.

@Archangel489 in short Naruto needs Sharingan to achive Rinnegan. He has chakra for Sharingan(Hagoromo's - Indra part) but cannot have eye because he need to be - emo(typical Uchiha) who he is not.