Tonight, from 23:00 to 3:30 (CEST), you’ll have the chance to test your strength against our mightiest and fiercest combatants in the battlegrounds of Patch 4.2.2 PTRs.

We’ll be in either the [Blizzard Horde] or [Blizzard Alliance] guilds. For last minute changes and up-to-date information, check this thread: http://us.battle.net/wow/en/forum/topic/3082248836#8