I heard about these rumors about a week ago. Don't know how much of the "leaked" material to believe. Some of those things they talk about in there have been floating around for months on the
WoW forums.... Some of it makes sense some of it I think is Wishful thinking. The Worgen Goblin Races added to the game as playable Characters I dont think is gonna happen. But I do think at some point they will add flying mounts to the original content. They just have to rework some areas since it wasnt added in the beginning you werent supposed to be able to get into some of the mountainous areas