Prestige 20 - Double Decade of Dominance
I see they are adding more Prestige levels... well, it looks like I'll never get to the end! The rewards follow a pattern now: Artifact power, Marks of Honor, a Prestgious Courser colour variation and then a title.
At least they took out the stupid pennant. I don't know if anyone uses it, but it's not particularly special. It's helped a lot that everyone is starting to enjoy PvP, so lots of BGs with guildies means lots of Marks of Prey!