Actually, Power Vacuum could be rolled into Supernatural Power Struggle.  So not only are Raith and Skavis contending for power, a third and maybe fourth party is also joining in to seize ground as well.  Hey, you know what, have it so that RCVs and BCVs are part of the struggle, since quite a few of the characters have a past with the other courts.  Toss in an enterprising warlock, who may or may not have tapped into Katrina, and the stew gets really ugly.  Maybe add in the Fae somehow or have some other kind of Emissary of Power add a little spice to the pot.<br/><br/>And here's a scary thought, following up from what Sessha said: what if Katrina was supposed to hit New Orleans dead on but something diverted it?