Hagoromo reveals to Naruto he's the reincarnation of his younger son, Asura. He asks Naruto if he can guess who Indra's reincarnation is, and Naruto correctly concludes it's Sasuke. At the same time, Hagoromo has the same conversation with Sasuke, revealing his status as Indra's reincarnation, and having him realise Naruto is Asura's.