Almira Izlay'ti
Character
While doing my own bit of informational gathering, I came across a quote from an interview that Entertainment Weekly did with George R. R. Martin, in which he said.
"Oh, you think he's dead, do you?"
Considering whom just returned to the castle, and the mythos surrounding her deity and what their priests are capable of (as well as a small storyline in the books that were left out that had to do with a certain Lady Stoneheart) as well as the leader of the Men without Banners (whom has been said to have died and been resurrected multiple times) my money is residing on the outcome that he is not dead.
Then again there is always the long wait until the next season / book comes out to find out.
I still think it was good that Martin told the show runners how the series would end should anything happen to him.