Update: Apparently I'm an asshole, and the adaptation of a previous story has been plenty acknowledged in reviews and the bonus DVD itself, as Johanna points out in the comments. So read the post below if you like to snicker at ignorant, reactionary fan babble.
We've been Netflixing the pants off of Batman: The Animated Series for the past year or so, and got a new disc this week for the second half of the 1998-99 Season Four (or Season Two of The New Batman Adventures, whatever organizational rules you go by).
The first episode on this disc is called "Legends of the Dark Knight," and is about a group of Gotham kids who all claim to have some insider knowledge of what the Batman is really like, and try to one-up each other with stories of their own first- or second-hand amazing interactions with the Caped Crusader.
Not that I've scoured the internet for relevant discussions, but I've read quite a lot about the Batman: Gotham Knight anime film (in addition to watching it twice), and I've never seen a single person comment on the fact that Josh Olson's chapter, "Have I Got A Story For You," is a fairly direct rip-off of that 10 year-old BTAS episode. There are a variety of substantive differences of course, and Olson's story was one of my favorite on the DVD, but part of that had been my impression of its originality. I suppose it's an idea that multiple people could have independently, and stories are adapted from other stories all the time, but I'm still a little let down that there was no acknowledgment that one of the stories is just an update of an old show.
Anyway, I feel obnoxious for even mentioning it, but it kind of bummed me out, especially since I liked the anime so very much. I kind of feel like a teenage Fugees fan in 1996 who goes to college and hears Roberta Flack for the first time. Or whatever.