Board Thread:Spoilers!/@comment-27010228-20151124211528/@comment-24674051-20151207154256

You know, from a series perspective, Regina is probably the strongest and most developed character. Even more than Emma or Gold. Some people might argue that much of the show has been about Regina's journey from the Dark to the Light. She is central is many of the stories, even if they aren't centrics. So having the 100th episode be a Regina flashback actually makes sense, particularly since that might give the best foundation for some of the characters that are coming back (Cora and Henry/Valet being a couple).