Board Thread:Naruto Discussions/@comment-4271790-20141016102132/@comment-1512913-20141020103810

@aka, I would say that chakra connects the impure land with limbo/purgatory, not with the pure land. We don't know where Indra and Ashura's souls are. If they are in the pure land, then they have no influence whatsoever because they aren't conscious. If they are in the limbo/purgatory, then they should in theory be able to do the same as Hagoromo did by manifesting himself from Madara's chakras.

In case that they indeed are in the said location, then it's possible the reason for which they haven't done so (manifesting themselves from their incarnates) is because they may be playing a game of "chess" simply observing and making bets which of the incarnates will prove victorious to determine whose beliefs were right.