For the second time in recent history, World of Warcraft players will be able to "timewalk" in an old raid. In the v7.2.5 PTR patch notes, there is a reference to heading to the Black Temple to take on Illidan on level and to score some gear based on current iLevels with updated looks from their earlier counterparts.
The update will also include
Several classes and specs will also see some significant changes: Destruction Warlocks, Outlaw and Sublety Rogues, Brewmaster and Mistweaver Monks, Havoc Demon Hunters and Guardian Druids. Developers have said that all classes will be given a pass by the dev team, but that these will be the ones with the biggest changes.
The preliminary notes are available on the World of Warcraft community site.