here's the thing. it's an impressive piece of art referencing a classic story sure, but during that infamous scene Joker and his men tore Babs' clothes off and took pictures of her naked while she was helpless on the ground ('cause you know, he had just shot her through the spine). that's sexual assault in any US court. DC probably doesn't want to show one of it's "strong female characters" crying and helpless as the perpetrator of the sexual assault taunts her by painting a bloody smile on her face with a gun pointed at her crotch.