I thought about this some more.
I'm far less enthusiastic about "Zodiac" now compared to last year. Stan missing a couple of good chances to talk it up, is what killed my enthusiasm. No video from the Comikaze Expo "Zodiac" panel isn't helping.
I still think it's being set up for a movie or TV franchise. I'm not sure if that would be dependent on book sales, though. I'll still probably buy a few copies of the first edition, if I can.
I found out that January is a slow month for book sales. There is a very good chance that enough will be sold to make some "Bestsellers" lists. It would only takes 5,000 to 9,000 sold books per week.