Neat video! I always enjoy watching skillful dancing, sexy or otherwise.
I can't tell whether or not she's wearing a bodysuit under the shiny stuff--I couldn't see one, but I did see what others have pointed out, that her skin is unusually matte below her shoulders (surprising, since she's exerting herself enough that you'd expect some sweating), and in some of the bends, her skin wrinkles in in odd ways that do look a bit like cloth, not skin. The matte quality could be the result of some kind of body make-up, I suppose, and if they did this in enough takes, they could have reapplied it as necessary. But yeah, it has a weird quality.
Of course, it's telling--telling of something mind-bogglingly obvious--that the go-to source for for superheroine costume comparisons is a temple dancer; the above cover is a straight guy's erotic dominatrix fantasy, and that's all it's meant to be. It's hard to be a woman reading superhero books if you aspire to see women depicted as anything other than wank fodder, which is part of why I no longer read them.