This incarnation has similar vibes to how Missy (The Master)'s appearance in the Peter Capaldi era of Doctor Who felt. Shame the writing kinda took a uturn on that, but it was a fascinating dynamic while it lasted.

I would definitely read a miniseries where Harleen and Bruce just hang out the whole time and everyone around them was weirded out.

Harley was a bird of prey, so it’s plausible.