Board Thread:Naruto Discussions/@comment-25531508-20140921150550/@comment-25387973-20140923153215

The Sage coming back was purely for plot relevance and concrete bullshit.the only explanation I can conclude is that the Sage created Asura and Indra to dominate.No matter what happens they must defeat their opponents through any means(Why Madara said only Hashman could defeat him).Circumstances must play for them to increase in power to ridiculous levels (even though it means the Sage returning back to grant them powers).It might be like an infinite izanami or whatever since there's talk about cycle and the past repeating itself.but this just my opinion till Kishi gives explanations