Greg responds...

I really only had two lists that I actually TYPED UP, one for teen heroes and one for possible Light members or allies. But keep in mind, I also have literally decades of DC Comics trivia in my head, plus two complete iterations of WHO'S WHO on my shelves, a DC encyclopedia and e-mail access to the incomparable John Wells, DC expert extraordinaire! Plus, you know, my contacts at DC: Ivan Cohen (formerly), Geoff Johns, Mike Carlin and Sean Ryan - all of whom were VERY helpful. Plus most of the staff -and half the cast - are bigtime geeks also.

Of course, AFTER we went into production, I started new lists of characters that we were actually using. But those are broken down by episode, not by hero and villain.