I recently came across a great blog by someone who has been in the animation industry since 1987.
Since 2000, Dave Kupczyk has been a character designer/developer for many animation companies. He has posted several character designs for series that never got past the development stage at Warner Bros Television Animation.
Proposed ideas included shows like a Top Cat revival, a Macy Gray show(?), a teen Thundercats incarnation and a series based on the Monkeyman and O'Brien comic series!At least Warner Bros has been considering other ideas besides Scooby-Doo & Batman...
Check out Dave's blog for more awesome artwork!