Didn’t Regina say it will be as if the first dark curse never happened, which is why SB disappears? Well, if that is the case, is that the same thing as rewriting history? Yet, if it’s as if the curse didn’t happen, how is Emma in our world still and how did she meet Neal to then conceive Henry? Or is it just the case that Emma thinks the curse didn’t happen (though it did), and that SB itself will actually reappear again when Emma believes? Confusing!
I think it was all about wording. Regina didn’t say that history would rewrite itself or anything like that but that it would be AS IF the dark curse never happened, in that SB will NOW cease to exist. So Emma’s and Henry’s memories will change but no one else’s. All the people that were born in FTL (and apparently conceived) were going to return with their memories intact but Emma and Henry are now “cursed” in a way with new implanted memories since all the FTL characters will just seem like stories again. The only reason why Emma can stay is because she is the savior and only the savior (or anyone conceived and born in our land) can avoid the curse. All the people that died during the time SB existed are still dead and any births (Alexandra) will still have happened. The question I have is what happens to the Darlings and the lost boys? I would assume that since the Darlings are from our world (I think, still a little confused about that one) they would continue to stay in our world and the lost boys would return to FTL if that is where they were from.
Now, of course, this is just my interpretation on this. The only ones that know for sure are the writers (Adam and Eddy in particular in this case since they are the ones that wrote this episode).
"We were happy."
"Because... it was born out of true love."