And here is something I should tell you about elsa's journey. 3 years after frozen Elsa is struggling to ketchup after 13 years in isolation. She worries about her relationship with Anna since kristoff is around. Elsa feels being left behind again and worry she won't get to see her more often. She would start to feel arendelle is not her home anymore, arendelle excepts her. But she hasn't excepted herself. When the enchanted spirits call to Elsa, she discovers the life she's meant to live. However by doing so she would risk loosing everything, including herself. Elsa wants to be with Anna forever but she also wants to be free. But when she chooses her freedom over Anna, not only Anna will be left behind again, but Elsa will lose her human side in the process (which isn't good since being human is so special). Even in the enchanted lands she still doesn't except herself. Not excepting herself is the main problem for her. She is growing, learning and having more experience. Elsa isn't just one world. She is two world's. She has a place in both worlds, royalty and magic. The thing is she doesn't realize that. It will take a lot of conflict and digging for the truth to realize that. Instead of Elsa living in a better place. Elsa will bring the better place to arendelle. Enchanted and arendelle co existing and Elsa being it's first ruler, along side Anna. That way the sisters will never worry about being separated, Elsa will finally except herself, anna will never worry about loosing her again and balance and peace is restored. It's my theory honestly but this theory is based on the infos, footages and character bios, there fears, struggles, and what kind of terrific ending Chris buck was talking about.