Board Thread:Spoilers!/@comment-26443838-20150705042216/@comment-24674051-20150713135459

I agree that he would not know specifics. But I feel relatively confident in speculating that they have a high level roadmap for the upcoming arc, and they know the endpoint(s) they are aiming for. They probably have much of the 'A' plot line mapped out, except for some details that relate to integrating the episode into whatever 'B' or 'C' plot is going on. And at least with the 'A' plotline, I think they would try to reveal as much of that to the selected directors so that everyone is working toward the same overall goal.

Sure there are going to be details that remain, and there are probably some things that even change on the fly, but that is probably more 'C' plot, or maybe 'B' plot, related.