As announced a week ago, World of Warcraft developers will jumping on to the PTR each Friday to participate in the forthcoming PvP Brawl system. Several developers took part in the Eye of the Storm Gravity Lapse testing event and WoWHead has posted a recap video of how the battle went and how the hazard affected its flow.
Other brawls include: Southshore vs. Tarren Mill, winter Arathi Basin, insta-cap Warsong Gulch, 15v15 arena and potentially others that have not been yet revealed.
In addition to PvP Brawls, the team also announced some potential changes coming to World PvP in Legion. This includes adding resilience to better scale damage versus health pool.
You can read more at the links above.