I happened across this little item, which comes, I guess, from the Wacky Races DVD. Interviews include Iwao Takamoto, Jerry Eisenberg (who did the character designs), and Hanna-Barbera's grand dame, Janet Waldo, one of two surviving cast members from the series (John Stephenson being the other). We know Janet can, at her advanced age, still do Judy Jetson, but can she call up Penelope Pitstop? Watch and see.
Wacky Races marked its 45th anniversary last year, and it's been 8 years since an attempt at a revival had at least reached the pilot stage. It wouldn't hurt to try again.