So I logged in yesterday and I pre-ordered the Dark Below, but I couldn't access it. It said it was installed and everything, but one of the icons was messed up. Needless to say, I was pretty annoyed. However, here is where it got interesting. Even though it said I was locked out of the story missions, Eris, and the lot, I could still do the Vanguard ROC playlist (supposedly DB exclusive). After doing two of those, I went to the crucible for a bit and selected TDB playlist as well. Magically, after doing both, I could access the quests from Eris and do the story missions after that. If you are still having trouble getting your content, Please let me know how this goes!