Originally Posted by
atomicbattery
This is factually, historically untrue.
The first three seismic events in outside media for Batman were the 1966 tv series, the 1989 movie, and the 1992 animated series. The producers of Batman:The Animated Series were given support, but no direction by the DC offices in New York. Batman was in the height of 'grim and gritty' storytelling in the early '90's, and the concept of Batgirl was, at the time, considered an embarrassing relic of the 'camp' era.
The introduction of Barbara as an ambulatory character, and ultimately Batgirl, in the animated series was entirely the impetus of the B:TAS production staff. Thus, Barbara became Batgirl to a second, enormous television generation of Batman fans- far greater than the size of comic readership. The animated series guys, by resurrecting Babsgirl, are really the ones responsible for Barbara becoming the 'iconic' version of the character. In fact, you can blame- or, I'd guess, thank- those guys for the invention of Cass. Batgirl became so popular on the animated series that DC editorial deciding to re-introduce the Batgirl concept in comics is largely attributable to Barbara's popularity on the show.
I have a magazine interview with Paul Dini somewhere from the early '90's (could be from Comics Scene, or Hero, or Wild Cartoon Kingdom, or Animation Magazine- you had to buy a lot of magazines back then, with no Internet, to find information on your favorite cartoon) where the interviewer asks Dini 'Why Batgirl?'. And Dini answered 'Because we love Batgirl'. It was very gratifying to read that answer in that era.
I think that what a great writer like Paul Dini, and now Joss Whedon, probably find appealing about Barbara as Batgirl is the inherent dramatic possibilities of her relationship to Batman (mentor) and Commissioner Gordon (father). There is no character in the Batverse, or in all of comics, quite like her. Dini exploited these powerful emotional connections in the great 'Over the Edge' episode of the animated series. I suspect Whedon is excited by all of the enormous storytelling possibilities of the character as well.