Game of Thrones season 7 will premiere in 2017, though its released has been delayed due to (quite unusual) reasons.
“We know some of his distant plans… but he doesn’t necessarily know everything that’s going to happen until he writes it!”
Game of Thrones’ season 6 was really a litmus test of sorts for the television show; an opportunity to see whether it could hold its own now that it’s overtaken George R.R. Martin’s own source novels.
It’s a wonder, then, what Martin would think about Benioff and Weiss’ openness to potential spin-off shows in the future; though they made clear no plans are currently in place for such.