Have not confirmed this but someone mentioned to me that if you look at the ending with Jon Snow and in the blood you can see a reflection of Melisandre so I think Jon might be ok.
Of course, something Maester Aemon said springs to mind...
“Allow me to give my lord one last piece of counsel, the same counsel I once gave my brother when we parted for the last time. He was three-and-thirty when the Great Council chose him to mount the Iron Throne. A man grown with sons of his own, yet in some ways still a boy. Egg had an innocence to him, a sweetness we all loved. 'Kill the boy within you,' I told him the day I took ship for the Wall. 'It takes a man to rule. An Aegon, not an Egg. Kill the boy and let the man be born.' You are half the age that Egg was, and your own burden is crueler one, I fear. You will have little joy of your command, but I think you have the strength in you to do the things that must be done. Kill the boy, Jon Snow. Winter is almost upon us. Kill the boy and let the man be born."