Board Thread:Theories and Speculation/@comment-26422608-20150522042352/@comment-5936871-20150522045642

Yes, if he acquires Sasuke's DNA specifically he would awaken it because he would combine Asura and Indra's chakra allowing him to awaken Hagoromo's chakra and thus the Rinnegan. Hagoromo was also born with his Rinnegan I believe, he never awakened it, he always had it just like how Hamura always had his Byakugan.