Spotted in a comment by edinjapan to Chicago Water Torture 2 - a story about a group of cosplayers who portray gender-reversed Justice League members.

"One night, we were all hanging out and I said how funny it would be if we had a whole Justice League with swapped sexes."
(one member of the group: Tallest Silver)

From the article:

Right now, Gender Bent Justice League has fourteen members and seems to be growing. In addition to Batma'am, Superma'am and Wonder Man, there are Green Lantern (Halle Jordan, Flash (Wendy West), Aqualass, Green Arrow, Vixen, Power Guy, two Hunters, Martian Maneater and Plastic Lass. There is also a Black Canary who was unable to make it to the con this year and they may have an Atom joining the fold.

The group's costumes also illustrate a social commentary on costume design: the male members are scantily clad while the females are fully clothed.

LA Weekly article

Meanwhile, several of them have DeviantArt accounts - here's a group shot of 11 members.

-oOo-

Meanwhile, in other San Diego Comic Con news, the blog site "Geeks Are Sexy" has collated four galleries of Creative Commons licensed photos of cosplayers from the hundreds (thousands?) uploaded to Flickr: Day One / Day Two / Day Three / Day Four