You ever run into that one dude from the enemy faction that you reaaaaaally don't like? The one who always seems to have it in for you and is a pita to kill unless you get the jump on them? The rotating pool of kill x players is fun and all, but why not spice it up some? Add in a new quest available from the faction generals to kill a 'enemy champion of the most troublesome sort' and you'll get a random name out of a pool of the top 10-20 of the opposing factions leaderboards. Completing the quest gives you about the same reward as the bounty quests, but it should be much harder to complete because this is the creme of the crop you're gunning for, and you're not liable to be able to do it easily.