Look out for the opinions flying in your face.

Not how we want to picture the DC heroine. (via Comic Book Resources)

The cover is a variant, meaning it was commissioned separately from the content of the story or its creators. It's just one artist's mind riffing on important themes in the Batgirl canon. The piece refers to an old comic called The Killing Joke, in which the Joker shoots Batgirl in the spine, paralyzing her, then sends pictures of her naked, injured body to her father, Jim Gordon. It's a famous storyline, but one that has received a lot of criticism for how it sexualizes violence. The illustration brought them up again:

Sources: The Daily Dot