not content wise, that's fine, I'm talking about the fact that you need the previous expansions, in order to use the latest expansion, you have to buy the ones before it (i.e. I can't have the original WoW and just go out and buy cataclysm, I need to get burning crusade and Wrath of the lich king first) Eventually, they're going to run out of new subscribers, because the cost to buy all the expansions is going to become to much. I feel they should go the way of the sims expansion packs (you can pick and choose which expansions you buy)