The thing I'm interested to find out is, if she does save him, then how? There's no sense from the books how Thoros is able to revive Dondarrion, and it doesn't seem like he needs any king's blood or the like. I had thought that Melisandre was perhaps going to sacrifice Shireen in order to save Jon -- which she might do in the books, but obviously she can't do that in the show, so who knows? But then again, if Thoros can do it without king's blood, why couldn't Melisandre?