From the DC Comics message board

Re: Top Ten Season 2 #4: why wasn't it finished? Posted: Jan 7, 2010 8:06 AM   in response to: buzz86
Buzz86-- hold tight; I believe that you will be happy when DC announces... a certain something... sometime later. Sorry to be vague; it's not my place to announce things. And thanks so much for you kind words. I'm really glad I didn't realize how daunting it would be to follow Alan Moore when I proposed the continuation, and it does my heart good to know people liked it. Zander