Whether or not I ever get around to the other two sets is still pure conjecture, but I am here today to take a look at the best figure of all of them: Miss Martian from the Miss Martian/Martian Manhunter two pack!
This action figure of Miss Martian beautifully recreates her Young Justice animated design. She technically has five points of articulation, but her hair prevents her head from moving and her skirt hinders her hips. The cape even limits her shoulders, so she really only has two and even those points of articulation aren't terribly articulated.
You can get her to stand on a flat surface, but fortunately she came with a base so you don't have to worry about her toppling off your shelf (which she will).
Miss Martian hasn't taken the toy aisles by storm, in fact I'm not sure if there exists any other figures of her besides the BootLEGO minifigure I picked up a couple years ago. She's pretty prime for the current DC Girls Superhero line though, so hopefully we see more of her in the near future.
As for Young Justice, it ended far too soon, and while the toyline had a handful of hits it suffered from many of the issues that tend to plague Mattel toylines, the specifics of which I will spare you from reliving.