Yeah, see in terms of Elseworlds, I wasn't exactly sure. It's not in regular continuity, but like you said -- it could be.
Anyways, yeah, tbh it wasn't the rape scene that shocked me as much as the crying scene. And I didn't feel it made him weak or made me feel sorry for him as it did make me think once again, he's being human and hates his humanity, but can't help it b/c he's still a human and he needs to eat, piss, sleep, etc.
In this graphic novel, the much better "joke" was when Harley got up on stage and started putting ON her costume to beckon a disloyal mob boss in order to strip him out of his skin. That took way much more creativity than the rape.