As a potential theme to NOLA, maybe something like "Waiting for the Other Shoe to Drop".  Katrina was a huge disaster and while things have gotten closer to normal, there's this feeling that things aren't quite over yet.  From the supernatural standpoint, Katrina was a great opportunity for anyone crazy and/or strong enough to harness it.  What if there was some indication that it had happened, that someone had tapped into the hurricane, but there so far has been no indication of what that power was used for.  So now, the Supernaturals are on edge waiting to find out what that power was used for.<br/><br/>I think it kind of ties well with the threat of "Supernatural Power Struggle".