My hopes are in HBO, apparently Martin told them how the story is supposed to go on just in case something happens to him, or for anyone with a clue - because he's a super slow writer and everyobdy knows the movie will surpass the books in couple years.
Even if book 6 goes out next year the movie will still finish way before book 7. Unles they stretch it, which is kinda good and bad at the same time, depends on the view point.