Board Thread:Naruto Discussions/@comment-25221642-20140813021755/@comment-3568954-20140813023902

Black Zetsu exact words were that the Zetsu are her soldiers if she was trying to bind them so that they are not destructive anymore he would not refer them as her soldiers

this implies she is doing so to create soldiers for an upcoming war.

maybe she intents to wage war on some cosmic entities or something