Well, one thing that the futon critic speculated has turned out to be right: the WB just renewed "One Tree Hill" for next season. So, that pickup would seem to leave slots open for only two new hour long shows - yet the WB has greenlit six hour pilots. That's not very good odds for some shows...
(Although, for what it's worth (and it wasn't worth much last season because he got practically everything wrong) the futon critic seems to think DS' only competition is from the Lost In Space pilot, with all the other hour shows battling it out for the other slot.)