Looking forward to seeing the upcoming pic and another view which may help explain some of these questions we all have regarding this pic. I tend to think that somehow they made her seem to young here for some reason as the other pic we've seen appears more like the character we all know. Jmho though.
As far as the stockings go, I think they match her outfit quite well as some of it is dark gray also along with some parts of a lighter gray with the pink background too.