Board Thread:General Discussion/@comment-33446972-20171217195401/@comment-28162607-20171218231526

One could go back to the seesaw theory of Emma and Regina; they cannot be happy at the same time. It's not confirmed in canon but it is interesting when looking at this.

Gvien that Robin's death was not a direct result of Emma's actions I don't think this counts.

Robin was killed because they wanted to explore dark!Regina again. And either Robin or Henry had to go and I doubt it was going to be Henry.