After seeing some things prompted by that sneak peek, I just want to say that being the Dark One doesn’t mean Emma Swan is no longer the savior. This doesn’t even have to do with Regina (I’m saving my thoughts on that until after I watch the episode), but I’ve seen some people here and on other social media platforms saying Emma is not the savior anymore and I’m sorry, but no. Emma was born being the savior and she will only stop being the savior when she dies. The only difference is that now she is also the Dark One. This isn’t one or the other type of thing. She is now both. And that’s what sets her apart from all the previous Dark Ones. I think it’s important not to take away such an intrinsic quality of Emma, and one that makes her who she is, just because she’s now filled with darkness.