It's obvious to me now what will happen in the end.
Jon will assert his claim and alienate Daenerys. After much tension and threat of war, She will take off with her armies and dragon and leave Jon and the Northerners to deal with the Night's King alone. The dragon Jon rode will stay loyal to him.
There will be this epic Alamo-style battle at Winterfell against the undead and at the last minute when Jon is about to die in an aerial dogfight with his dragon vs the Night King and his undead dragon, Daenerys will swoop down on her dragon and save him and then either die valiantly or marry him and rule as his Queen. Sam will be the King's Hand. Cersei will be eliminated through her intrigues with Euron and Euron will be killed by Theon who will also die.
Jaime will die honorably saving Bran. Probably side-by -side with Bronn, who will betray Cersei. Tyrion will survive and decline all position and honors in favor of getting drunk with whores.