I was one the early visdev artists, (Paul Felix did some killer paintings as well), on Frozen back when it was still called The Snow Queen. These are some of my Snow Queen concept pieces. This was before the Anna Elsa sister concept was part of the story. Anna discovered the long neglected Snow Queen's ice palace high in the mountains, and then the Snow Queen's body encased in a huge block of solid ice within it's frozen walls. Anna unwittingly resurrected the Queen and her ice palace to full fury. The penguin was just me throwing ideas for frozen tundra character ideas, never really a part of any version. Chris Buck had an army of snowmen in the story back then, and I gave the queen a flying sleigh for heightened action possibilities.