I think this was definitely the best of the Dark Reign minis. It was obscure, stand-alone and dark. It had some gaps, but I chalk that up to, "Leaving openings for future storylines."
The Zodiac might be a rip-off of DC's Joker, but hey, it's not like this is the first time that's happened for either company. And if anything, he is much cooler than a dude dressed as a clown!
It will be interesting to see what becomes of Zodiac. I'm sure the sales weren't very good for this obscure book, so only time will tell.