Board Thread:Show-Related Questions and Answers/@comment-25491743-20170410132437/@comment-6175354-20170410162145

Farerb wrote:

When Rumple said it, I don't think that they intended for the final battle to be with the black fairy I am pretty sure the intention was for the Final Battle, to be with whoever created the Dark Curse. The creative team probably decided for it to be the Black Fairy, when they saw how interested fans were, when she was namedropped in S3. Though, I feel, they should have introduced the Black Fairy, before turning Emma into the Dark One.