User blog comment:ArtDraw12/TD Theories: Who May Return in Potential Future Seasons?/@comment-22535514-20161028235654/@comment-11883116-20161029000104

Potential is something that I also included and Eva has lots of it. And I'm sure creators have heard fans comparing her to Jo. Plus, they are slowly running low on main antagonists potentials. Eva is one of a few still available ones and the more she'll be annoyed and the bigger are her chances for being main antagonist.