I reallly think Morena Bacarin who played Inara on Firefly and Serenity should be Wonder Woman.
Interesting thing last year at the Serenity panale, a fan said told Gina Torres she was an awesome actress always playing such strong female characters (she's about 5'11") and would be perfect for Wonder Woman. Joss Whedon said "I don't know, she may have to fight over it with Morena." Could have been a joke, coulda been a hint.