User blog comment:GWAINE/Finale Speculations...?/@comment-195.41.137.218-20121129163159/@comment-5102537-20121201105324

"In terms of uniting Albion under his rule as High King, or something along those lines, that goal - if it is his goal - seems no closer to being realised. Arthur has allies among the other monarchs but none of them seem to be inclined to surrender their sovereignty. We also know from the last episode that the peace between the Five Kingdoms has apparently lapsed since Uther's day, since Arthur needed Sarrum to help achieve it."

Interesting. Uther united the Five Kingdoms in season three and in "The Death Song of Uther Pendragon" Arthur told his father that he has achieved peace - I still wonder what peace? The only war Camelot had was with Cenred when Morgana and Morgause attacked Camelot with his army. So if the peace contracts lapsed during Arthur's reign, what peace has he achieved? And was Sarrum one of the four kings that came to Camelot for the peace treaties in "Sweet Dreams"? I highly doubt that, so I wonder where Sarrum suddenly came from and what he has to do with the Five Kingdoms.