Idea: "The Grey Knight" PvP Tournament
Anyone who joins gets a full set of level 80, class-appropriate grey-quality gear (plate for plate wearers, cloth for clothies, etc), and choice of grey weapon/shield (you want a sword, dagger, axe?) from the GM hosting the event. Only non-grey item you get to use is the low-level trinket to escape snares/CC. Other than the gear gimmick, it's a standard-style PvP tourny. Let's see who knows their core class's abilities and strengths best when you aren't looking at BiS!