I’m inclined to think Dream as well. If they’re shooting 3×13, perhaps it goes along with the idea of Witch Hunt? If it IS the Oz thing, it could totally be a dream someone’s having (and Snow’s hair being long again, Neal wearing Bae-esque clothing etc), and it could be a nod with them waking up and talking about a dream with the “and you were there and you and you” etc etc (although not sure if they could get away with that in too obvious of a way since it’s from the movie and not the books for Oz but it would also be totally plausible if whoever is dreaming snaps out of it and says they saw all of them.
I was debating time jump so that they could write in Ginny’s pregnancy as well. But her hair shouldn’t be that long unless it’s a considerable jump and in that case, where are Emma and Henry? I don’t want them all separated from everyone else for too long but I’d be surprised to see them catch up with the others quickly and it seems strange that everyone is back in their old clothes for no apparent reason, and that Snow’s hair is considerably longer so I think this has to be a dream sequence right? Otherwise it makes very little sense.
I hope we have more to go on by the end of 3×11 cause right now the second half of the season isn’t making a whole lot of sense!
Keeper of Hook's Trenchcoat.