Board Thread:Theories and Speculation/@comment-27082825-20150128192929/@comment-25632268-20150128202028

I think the cycle would continue. Was there actually clearly stated that Indra could reincarnate only as Uchiha? Uzumakis were distant relatives to Senju (distant enough to allow safe marriage between clans members) and it was enough for Asura reincarnation, so maybe there were distant relatives to Uchihas as well.

Of course there would be a matter of dispelling infinite tsukuyomi, though I think Kakashi and Sakura have means to do so (tailed beasts would be free after Sasuke's death and you taking rinnegan from his corpse should be no problem)