According to his interview, he is NOT under contract. I still think it's a scam, but he did say the claim he already signed a contract was false.
There's already a controversial Instagram pic of Kit at some kind of coffeehouse in Belfast. Guess what's going on in Belfast, Ireland right now??
Plus I believe the reason why there is no Lady Stonetits is because the TV show wants to use the shock of the resurrection scene with Jon. If they showed everyone that Kat can come back...then Jon can too.
They did re introduce the mountain right before Jon's scene.
As someone else pointed out...there was no 'sad to see Kit go' that hell they did for Ygretti. And for Jack Gleason...and for Richard Maddon. They just said like Ned, Jon paid the price for his decisions.
So yeah...Jon's not dead.
I do think Stannis is. I was glad that half his army left after the burning of Shireen. That was a horrible decision that cost him everything...his daughter, his wife, his legacy and his war. He had that coming and Stephen Dellane played him perfectly up to the last scene when he surprised Brienne by admitting he used black magic and for her to do her duty.
So my guess is Jon and Sands is still alive. Stannis and Mel are dead. Arya is temporarily blind. Her teacher is still alive and a faceless man.
I also think the Hound is still alive.