Batgirl totaled the Batmobile?
That's the Babylon Bee's theory.
On the other hand maybe they just wanted to avoid another Halle Berry/
Catwoman fiasco (The film received seven Golden Raspberry Award nominations and won in the categories of Worst Picture, Worst Actress, Worst Director and Worst Screenplay, and has been voted one of the worst films of all time).
Batgirl Movie Canceled After $70 Million In Batmobiles Destroyed Backing Out Of Batcave