Board Thread:Spoilers!/@comment-4877635-20140915180352/@comment-24674051-20140915195022

I doubt it. Early in the description it specifically says Middle Sister of 3. So that, at least in my opinion, rules out the 12 Dancing Princeses.

The fact that they are off to a ball makes it sound like a flashback. (Unless we start seeing a lot of balls in SB).

And the fact that it in an episode entitled "The Snow Queen" makes me think this has something to do with a younger version of the Snow Queen (before Elsa). Maybe a younger version of Elizabeth Mitchel's character, before she obtained her icy powers? That's just a pure guess, though.

Other that that, I got nothin'.