The release date for World of Warcraft: Classic phase 2 was announced at Blizzcon, and it's right around the corner. The release date is set to be November 12 in the Americas, November 13 in Europe, and November 14 in Asia.
Phase 2 brings in PvP action, and players can now kill members of the opposite faction to get Honor Points. The phase does not bring battlegrounds though, so it's only tied with world PvP right now. If you're on a PvP server, then the first few weeks after the patch will likely cause a lot of chaos!