This came up on the CBR boards, and it's going to bother me forever. Apparently, due to some kinda corporate shenanigans, Wonder Woman is blocked from appearing on certain DC television programs.
Here producer James Tucker says
We don’t have permission at this time to use Wonder Woman or Superman.
We also got this post from a poster who goes by Captain Canada, saying that Paul Dini couldn't use Wonder Woman in Batman Beyond, and that Wonder Girl was blocked from appearing in Teen Titans. (Can anyone verify?)
So. What gives? Does anyone have actual documented proof as to why Wonder Woman has never shown up as a "guest star?" The whole thing seems more'n a little silly to me, but is there a decent reason?