Blizzard promises big layering improvements for World of Warcraft: Forever at launch
Blizzard says the layering system in World of Warcraft: Forever will get major improvements before launch. Layering runs several copies of the world at once, and players are placed in a layer based on things like friends, language and PvP balance. Blizzard says grouping with someone on another layer will move you over to them.
Game: World of Warcraft: Forever