With all the respect to all of the comments above, I somehow feel that Jon and Danaerys will have a child who will be the only survivor as it’s a song of ice and fire. Not sure why I’m guessing this... but.... maybe Night King will not fall for a dragon glass. And maybe the Night King is Bran as guessed above by AdamMagus.
However, I won’t be disappointed if the Night King wins because Thanos said that we all die but we should keep on fighting our only enemy which is death! And maybe Arya has something to do with her ‘no one’ skills here as she knows only one god which is the God of Death and she says to it only one thing which is ‘not today’...
I love GOT. Can’t wait for the season 8 the finale!