Warcraft fans will be delighted to know that WoW is finally heading to Northrend.
Rumor has it that Video Games Live orchestra will be playing 3 pieces titled Northrend 1 Northrend 2 and Northrend 3 at a BlizzCon concert. Northrend doesn't exist in World of Warcraft yet, but it is the home of Warcraft 3's fallen hero Arthas the Lich King.
Rumors aside, German Unterhaltungssoftware Selbstkontrolle (USK) ratings board (ESRB equivalent), has granted a game called "World of Warcraft: Wrath of the Lich King (GC-Demo)" an age rating of 12 and up. Most probably, the demo was given to the German ratings board in preparation for Leipzig's Games Convention in three weeks.
One final unsubstantiated rumor: the new expansion will introduce a new class called Death Knight. Death Knight was originally planned as a class in WoW, but didn't make it to release.