Yeah I figured they would have to get back there eventually. I think with season 5 we are going to be seeing the DO mythology explored a lot more (obviously) and I for one am so excited for it! I doubt they will simply redo what we’ve already seen (and tbh, we really haven’t seen THAT much), but rather I think they will expand and add to it.

Adam and Eddy mentioned in an interview that “Emma is going to be taking us into the Dark One and the Dark One mythology, and we are going to learn this first half of the season who the original Dark One was, what made them tick, and why there is even a Dark One to begin with.” So basically, there is a lot of gaps in the mythology for them to work with and I can’t wait to see what they come up with :)