"Two new PvP-centered heirlooms have been added to the arena chests in Gurubashi Arena in Stranglethorn Vale and the Deathmatch Pavilion on Darkmoon Island. Master Pit Fighters or Arena Grand Masters, hop into the arena and defend your title for a chance to loot these new prizes!"
I wonder if the AGM my toons currently have becomes the new heirloom... or if I'm actually gonna have to fight everyone who's going to show up now for the "new" one. Never thought that I'd ever have a use for the dmf one, so I deleted that a while ago... ugh.