Power Girl continues to be by far the sexiest heroine in the DC Universe. That version in World's Finest with the full-body costume might be from an alternate timeline or something, but in 2015 Power Girl continued to flaunt the boob window and even Harley Quinn took note, as she designed a new, more superheroiney costume which also has a cleavage hole. Together Pee Gee and Harley star in a very sexy 6-issue miniseries (the whole tale takes place between panels 3 and 4 of page 20 of Harley Quinn #12!!) where they go back to the planet run by Vartox (who had pursued Power Girl as a mate in Power Trip). Stephanie Roux's art is great when she's drawing closeups but when the characters are farther away they get a little bit too stick-figurey. Minor quibble, though.
Written by Amanda Conner and rated T for T**ns..but apparently they have no problem making reference to cameltoe, fruit-flavored lubricants, buttplugs, lolliopops shaped like penises, massive erections, a lusty moon covering with phallic shaped buildings, a porn 'stache, form-fitting fetish raiments', and 'fro-yo' (swallowing cum) all within six issues. Basically resurrecting the kind of humor we used to love in Penthouse Comix. Hilarious!

Then there's the lovely addition of Vartox's own superheroine squad, his Ex-Girlfriend Force. (aka "team Estro-Fest" or "the Glory Whores", etc.)
Naturally they're all jealous of Power Girl

And there's the evil squad of sexy attack nuns with guns:

This comic series could just straight be adapted into an awesome superheroine sex video.