I don't think the next season is going to be until later in 2018, they haven't started filming yet, October 2017 is when it is slatted to begin but holy shit that episode was amazing... I thought Sansa was a stupid girl still who would believe anything but watching Petyr's neck open and blood on the floor really cemented the fact that she changed her ways and is no longer a dumb little girl with stupid obsessions. Also, that dragon arc welding the wall is gonna be a wee little problem