Apparently, it's coming. Network announcements of what's staying and what's going. I'm pleased about Numb3rs, Ghost Whisperer, and Ugly Betty likely staying. I'm unhappy about possibly losing Reaper. I'm not that unhappy about losing Eleventh Hour. I wasn't feeling it (and neither were many others.)
So what is on the fence? Medium, Dollhouse, and Chuck. Love, love, love Medium. I don't know how they could even think of replacing it. Dollhouse has turned out to be very interesting. I'd like to see how it develops. I still love Chuck, but I can see how it is really hard to keep the idea fresh.
You might want to take a look at where your shows lie. Ain't It Cool has the scoop.