She's saying she wants to know what women reviewers think of the movie before seeing it just in case they set the Joker up as a psychotic killer a la Hawkeye in IW (going on an emotional killing rampage that just so happened to target Mexican and Japanese criminals instead of white American criminals). Sometimes (actually quite often) directors and writers will make women and/or pocs collateral damage so it doesn't inspire so much outrage when they want the audience to still like or sympathize with the guy doing the killing. All she's saying is that she wants to know who gets the brunt of most of the Joker's wrath in the movie before she forks over $20 buck to see it.