Are you sure about that? Ivy's first appearance was in the June 1966 issue of Batman. The June issue would have gone on sale in March or April, or only 2-3 months after the series premiered. And, given comic book publication lead time, that would seem to indicate she was created no later than January 1966.
Batman didn't begin airing until January 12, 1966. So, while it is possible she was created after the show first aired, it seems unlikely.
Furthermore, before it began airing, most TV executives considered the show a likely flop (it was one of the worst tested pilots in history). As such, it seems unlikely DC would have been overly worried about synergy until February 1966 when the show was solidly established.
Well, the record shows that's not the case. As I said, well
before the show premiered, back when it was just in development, DC editor Julius Schwartz decided to alter the Batman comics in a way that would make it better source material for a television show. Thanks to Fredric Wertham and the Comics Code, most of the major supervillains of the '40s and early '50s had been expunged from Batman comics, replaced by fanciful adventures in space and time and weirdness. But when Schwartz heard that a TV series was being developed based on Batman, he decided to bring back the rogues' gallery, because he realized that the show would be better if it had recurring villains who could be played by big-name guest stars, and he knew that the show's developers would be drawing on the comics and putting together their show based on it. So we know that Schwartz modified the comics to
anticipate the TV series. That was before the pilot was made, before any of the network buzz about it being a likely flop.
So it seems to me that the synergy here wasn't about trying to capitalize on a known success, but about trying to help make the show better and improve its chances, so that it
would provide better synergy and promotion for the comics in turn.
You'd have to ask Alan Kistler what his source was for listing Poison Ivy there. Maybe her creation was separate from Batgirl's. But her creation could've been part of that same initial push to reintroduce the rogues' gallery as a major component of the comic.
A shame Ivy never appeared on the tv show. She would have been a natural.
Maybe Ann-Margaret? Or Racquel Welch?
Ohhhhhhhhhhhhh, my. That would've been extraordinary.
As divine as Raquel Welch was, I'd have to favor Ann-Margaret for Ivy; she looks the part more. (Kitten with a Vine?)
Hmm, what would the 2-parter's rhyming episode titles have been? "Ivy-Covered Hoods"/"Batman Gets the Goods." Or "How Green Was My Villain?"/"Ivy Makes a Killin'."
I've always thought it was a shame they never used Two-Face, since his fixation with the number two would've been a natural gimmick for the show. "I've got it, Robin! Two-Face's lair is the Janus Mask Company at the intersection of Second Avenue and Gemini Lane!" I guess the makeup would've been too expensive or too ghastly, but they could've gone the
Phantom of the Opera route and had him hide the scarred side.