Batman Returns screenwriter Daniel Waters on whether or not it influenced Batman: TAS
https://diaboliquemagazine.com/episode-13-a-conversation-with-daniel-waters/
https://www.batman-online.com/forum/index.php?topic=3999.msg61710#msg61710share
“Outside of the [Penguin’s] flippers, I really don’t […] I didn’t see all of the episodes. They’re very well done, but I think they are much more left brain than me and Tim Burton’s right brain kind of movies […] They managed to work out our crazy kinks. They’re much more good yarns, solidly done, than our kind of crazy bat-sh*t movies.”