I'm EXTREMELY excited for the new PvP system Blizzard is implementing into WoW with Legion. Recently I had gotten into doing Battlegrounds and a few Arenas here and there with my buddies in WoD. So I really think Blizzard might impress me a lot with this new prestige like system and PvP specific talent tree. Compared to right now the PvP feels really stale as for the only thing I can really achieve is Rating or Gear, I'd really like a whole new "leveling" system in PvP.