Board Thread:Spoilers!/@comment-1916997-20170217023403/@comment-24674051-20170502042142

I'm not 100% sold yet, but I've kinda felt that this is the direction they would go when the casting announcements were first published. The only thing that gives me any doubt is the fact that the girl is Latina, and I have already found a solution to that issue that is plausible. And the fact that they actually took time to set up the possibility makes me think that the writers have at least considered this option as well.

Also, given Zelena's current state of powerlessness, it makes sense that Regina would send her (since she does have at least a modicum of experience in the LWM) as the guardian for Henry. It would protect Zelena, Robyn, and Henry.

All that remains is to see how the final battle plays out (which will occur after the wedding).