There are actually two Batman animated adventures on the Mystery of the Batwoman DVD release. There is the feature film title involving the Batwoman, but then there is also -- separate from the feature film -- an excellent original short film titled Chase Me featuring Batman going after the Catwoman (with the soundtrack being some cool jazz music).
Description text from Amazon.com:
"The Dark Knight is back in this all-new feature-length thriller featuring the voices of Kelly Ripa (Live! With Regis and Kelly), Kyra Sedgwick (Born on the Fourth of July) and Hector Elizondo (The Princess Diaries). The Penguin and Rupert Thorn are criminal cohorts with a scheme to sell illegal weapons. But there's a new super hero in Gotham City who has other plans for the evil entrepreneurs - Batwoman! With high-tech gadgets and powerful punches, Batwoman proves to be a formidable crimefighter - the only problem is that the Dark Knight has no clue who she is! And when Batwoman crosses the criminal line, Batman must identify whether or not this new player is really an ally! Join the world's greatest detective in this exciting new adventure that will keep you guessing until the mask is pulled off! The DVD includes an exclusive Batman animated short, 'Chase Me' from the Emmy(R) Award winning writers Alan Burnett and Paul Dini."
No, it's not a movie but it is the only new Batman adventure that features the Catwoman and it is related the the Batwoman DVD after all. Nothing wrong with mentioning it since the film chase me may or may not be the new titled Batman piece that brainchild81 is searching for. No harm in helping out someone's search by pointing out something that hasn't been mentioned yet.
Btw, why didn't you find Chase Me on your Mystery of the Batwoman DVD? Didn't you do a thorough search through the menu? Hmmmmm? 🙄