HBO

Before Dany and Jon's ancestor Aegon the Conqueror waged war on Westeros and united the Seven Kingdoms under his rule, they were separate, with their very own rulers. Some people believe the only way the show can end is for the Iron Throne to become meaningless — there will be no one on the throne, because it won't exist anymore. They kingdoms will become independent once again, just as the North already did when they nominated Robb and later Jon as King in the North. But since Game of Thrones is partially inspired by British history, the chances of this happening seem low.

Likelihood: Low to medium