Many players have said that the next hero class to be introduced in World of Warcraft after the Death Knight will be the Demon Hunter.  While we're pretty sure that they have good reason to believe that, Blizzard has given word that it's too early to say for certain.

Community Manager Bornakk said that they have not announced any other Hero Classes at this point in time. He added that they are still waiting to see what effect the Death Knight has on the game.

While this may come as a bit of a let down to some of the players, we'd like to remind everyone that Blizzard has been saying this ever since Wrath of the Lich King was announced. However, it might be good to note that the company has been very selective with their announcements as of late. Perhaps they might already have something lined-up.