The first thing I ever thought of when I thought of Buffy, the movie, was the little... blonde girl who goes into a dark alley and gets killed, in every horror movie. The idea of Buffy was to subvert that idea, that image, and create someone who was a hero where she had always been a victim. That element of surprise … genre-busting is very much at the heart of both the movie and the series.

Welcome to the Hellmouth (1997) DVD Commentary