PvP Brawls are a Player vs. Player mode that is available every other week and offers a variety of modes, rules, and scenic changes to the usual battleground gameplay. Most, but not all, Brawls consist of tweaks to existing battlegrounds or arenas. When a Brawl is available, it can be queued through the Player vs. Player interface. Entering a Brawl will prompt Something Different, which can be completed once per event.
The goal of Brawls is to add variation to the battleground experience, and also allows Blizzard to experiment with new ideas for rulesets, match types, and game types. The most successful Brawls could potentially become permanent fixtures in the PvP landscape in the future.