Cersei Lannister surveys all the corpses around her, starts yelling "DID I WIN? DID I? IS EVERYBODY DEAD?" in a broad Brooklyn accent.
Screen pixellates into the DELOS logo.
No end credits
That would have been a LOT more apt, really :-/
Unless the hero decides that isn't what they want.
Which results in a lot of blood and ash on a lot of hands.