Board Thread:Naruto Discussions/@comment-25442710-20140920121351/@comment-26302001-20141006003552

while that does make sense Randell, Obito did not awaken Rinnegan.. and Hagoromo says combining Indra and Asura chakra makes his Chakra which makes Rinnegan. So I think it just comes down to Kishimoto making a plot hole.