The animated The Killing Joke was weird mostly for the shoehorned-in Batgirl-Batman fuck scene, but also for the surprisingly cheap animation.
Others will doubtless chime in with objections to using rape as a means to establishing the bad guy’s badness, but I still don’t quite get that. You show a villain murdering someone, that tells you the villain is a murderer. You show a villain raping someone, doesn’t that tell you that the villain is a terrible person? Is the objection based on the possibility that a degenerate reader/viewer might get off on it?