I can't tell whether this is a miniseries or an open-ended series, but HBO has
True Blood starting in September.
Pros: Vampires, Anna Paquin, created by Alan Ball who did Six Feet Under.
Cons: Based on an incredibly boring paranormal romance, on cable which I don't think I have.
Truthfully, I would be more interested in a second season of Moonlight because it's so baaaaaaayud, but apparently someone put a fork in it because it's been cancelled.