George RR Martin is trying his best to make sure that he finishes The Winds of Winter as soon as possible. Recently he had announced that he will be skipping San Diego Comic Con for the very reason and now he had made another announcement. He announced on his blog that he wont be writing the script for an episode of season 6.
[A]fter wrestling with it for a month or so, I’ve decided not to script an episode for season six of GAME OF THRONES. Writing a script takes me three weeks, minimum, and longer when it is not a straight adaptation from the novels. And really, it would cost me more time than that, since I have never been good at changing gears from one medium to another and back again. Writing a season six script would cost me a month’s work on WINDS, and maybe as much as six weeks, and I cannot afford that. With David Benioff, D.B. Weiss, and Bryan Cogman on board, the scriptwriting chores for season six should be well covered. My energies are best devoted to WINDS.