Board Thread:Show-Related Questions and Answers/@comment-24304025-20140627165613/@comment-4877635-20140630131059

Dan Fox wrote:

There was also the theory that Cora got ahold of Elsa to try and cause such a harsh winter that Eva would lose her child. But that would be just a little too twisted for Cora' character, and she is pretty twisted.

That was my theory. I've always thought it could be a way of Cora getting rid of Eva's child and making her feel like Cora did when she had to give up Zelena. Plus we'd get to see Cora in Season Four which would be great. Her character will always live on in the fandom.