Director Scott O'Brien:
Story artists were Andrew Dickman, Erik Knutson, Howie Perry, and me (just a tiny bit).
If you're familiar with the episode that aired, you'll notice several differences here:
First, Warner Bros felt we weren't treating the Batcave as if it were a big enough deal, so that got changed for the final quite a bit. Secondly, they didn't like the 60's Batman gags (which both Erik and Andrew ingeniously put in). "It's old. It's been done," they said.
Oooohhh... but I strongly disagree.
You can never have enough 60's Batman.