Brendan Moody wrote:
They know some major aspects of the ending, yes, but I doubt they know enough to put together a decent TV version of the rest of the story, and I'm not at all sure they'd want to. Especially since, as was discussed the last time this came up, there are other options.
Screw other options, Martin wouldn't have told them things if he wasn't okay with them using the informaton. They don't have to know every detail, as long as they know what happens to the major characters and plotlines it's not hard to figure out a way to get them there. They are changing parts of the story anyway, so it doesn't make much of a difference.