Blizzard has said World of Warcraft Patch 4.3.2 will add the ability to form cross-realm raids with Real ID friends in older normal or heroic raids and in Battlegrounds. Expected for quite some time, the functionality was added to cross-realm parties last year. The ability to run normal or Heroic Dragon Soul with cross-realm Real ID raids has yet to be implemented. More information can be found through the link. The firm also noted that a hotfix has been applied to the game’s Hour of Twilight content. Notes can be found through here.