No they wont. This would take at least twice the amount of written story line and it somehow would have to make sense. Then you have to ask the question: Should we really stick certain races behind a label so that people that want to play race x have to accept whatever the game throws at them? Also how long would a evil side even make sense? WoW makes it (as far as I know) always so that somehow peace is achieved at the end only for it to be destroyed in the next expansion. Just doesnt feel like good storytelling after a while.
