They have stated very clearly that there are no class stories, only planet quests. So let's all hope is so amazing that we don't mind doing it over and over again!
I couldn't find that answer. Well that sucks; that's basically the part I enjoy the most. I have a sad feeling this expansion is going to bore me quickly. : / Hopefully they'll add to the class stories eventually. I don't mean to pout but I've been playing since launch; I have almost every class maxed out. At least if I was going to get new class stories for each of my 50s that would have been more enjoyable. Sigh.