Board Thread:General Discussion/@comment-6036560-20140421102126/@comment-8345449-20140424142749

I think it might make an interesting moral dilemma for Emma, if Zelena succeeds in travelling to the past and killing Eva. Suppose somehow Emma escapes being erased from history due to her being the Saviour but Snow, Henry and Regina were never born.

Assume the curse didn't happen in the new timeline because Regina was not there to cast it (and Zelena died in the finale). If Emma tries to "fix" the timeline, she will be morally responsible for the entire EF population being devastated by the curse (not to mention all the lives Regina killed while she was still evil); but if she does not do anything, Henry and Snow are lost to her forever.

So Emma would have to become a villian in order to save her family.