One of Roose and Ramsey will kill the other, and it will come out of nowhere. Ramsey is such a colossal screw up that his continued existence is becoming problematic in the plot, and this is usually around the time that the show kills a character off. Either Roose will kill Ramsey, or Ramsey will realize it is about to happen and kill Roose. I don't see both of them surviving the season.
No way Bran survives the show (although if he becomes a tree, is he really dead?), but i think he makes it out of this season.
Jorah is toast.
Varys is almost like a narrator in the show, so he will make it.
The High Sparrow is almost certainly dead. Jonathan Pryce is in a million things, so I would be surprised if he comes back for another season.
I think Sansa is going to win, so obviously she survives.
Arya is going to kill 1 or more characters this season.
Tyrion is 50/50.
Tommen, Cersei and Jaime are going to be kept around a little longer.
I think Margaery makes it through the season, Loras doesn't. I think the actor that plays Loras is already starring in another series somewhere.
Wilko Johnson, who plays Ilyn Payne, has terminal cancer. I suspect this is why they eliminated the character from the show and replaced his parts with Bronn.
My overall predictions for the SHOW only:
Sansa wins - even if Martin has something different in the books, i think HBO will have the Starks win.
Danaerys dies fighting White Walkers with her dragons.
Arya kills Cersei eventually.
Brienne and Jaime vanish together, and one of the last scenes of the show will be them on a farm somewhere.
Sansa marries Margaery - OK, this is what I want to happen. Sophie Turner is 20 now. Time for her to step up in the nudity department.