You're talking about a 20+ year old non-canon media adaptation and some of its spin-off comics. Their relationship has never really been portrayed that way in canon.
Lol why even bother talking about her relationships in comics then?I don't find their other depictions very interesting probably in part because I personally don't think Harley is very good character outside of the DCAU (yet she's shoved everywhere).
Who else is as big? Cap/Bucky and Holmes/Watson will never move past fangirl ships so Harley & Ivy are the most popular canon queer couple by default.Source on them being the most popular queer couple in pop culture right now? They are undeniably popular, but as far as pop culture goes people still think of her with the Joker before Ivy.
Also, how is Joker in the running for a queer relationship? Unless you're talking about his one-sided obsession for Batman.