Oh, I'm so happy to hear that the characters from The Snow Queen will appear in your story. It's nice to see the story get more attention. Frozen was average, not bad or perfect, I enjoyed it. But it's a shame we'll never see Disney tackle The Snow Queen. Will the characters be given your magic touch, and given original designs :)? Or will they look like one of the film versions (for example: the Russian animated movie)?
We made our Snow Queen characters months ago. They are a mix of Frozen concept arts and our own ideas :D.