Board Thread:General Discussion/@comment-35639545-20141227204623/@comment-1894786-20150331213706

Oz could be teamed up with Arendelle, actually. I know people are sick of Frozen, but Elsa is Queen of Snow and Ice. Santa Claus is a canonical resident of Oz in the Oz books; he's even a high ranking member on some council.

Santa is associated with winter, and therefore has a connection to Elsa, also associated with winter. They could throw in a little bit of The Santa Clause trilogy by making Jack Frost into Santa's enemy. But since many people ship Elsa with Dreamworks' Jack Frost (from Rise of the Guardians), they could make Jack be Elsa's suitor or something and then have her love redeem him like with Rumple and Anastasia.

So Zelena and Jack Frost could be the villains and threaten Oz and Arendelle, and it could be set before the events of 4A. So Anna and Kristoff are still engaged, no one knows about Ingrid, etc.

It could shed some light on the earlier parts of the timeline.