Board Thread:Episode Discussions/@comment-1251315-20160721110532/@comment-25122992-20160724202422

No, I don't think Hagoromo was implied to have known about Black Zetsu. Rather, the latter's role was shown there to complete the story itself, but Hagoromo could've already learned about BZ after his death and made a conclusion regarding his influence over Indra. But overall, yeah, in this filler Hagoromo doesn't seem to really care about Indra and his way of life, although during the talk with Naruto/Sasuke he still admitted that he hadn't actually paid enough attention to Indra.