no no no You won't be able to have Worgen or goblins on any accounts you have now. They will all have to be upgraded to Cata, which all have to be BC/WotLK before that. Watch for prior upgrades falling steeply before Cata comes out. ( seeing a little of that now) There might also be a new combo-box with all three ready to go. So like $40 for WotLK ready accounts and then $40 for Cata ($60? For the collector edition) Be there done that.