Before Batman: The Animated Series (1992) was approved, Bruce Timm and Paul Dini created a short proof of concept to show Warner Bros Animation the show's tone and style. This short helped get the series greenlit, and much of it was incorporated into the iconic opening intro.
If you’re a man, and your takeaway from the movie was that Nikki represented a crazy girlfriend, saw her as the villain, or you sympathized with Bear… women should avoid you at ALL COSTS.