Except the Queen of Heart’s was about Cora, and I don’t think they can do anymore with that. As for the Heart of Darkness, that was in SB and really didn’t do much except having the heart in the box. Now “The Heart of the Lonely Hunter” that I think is a different story the Huntsman lost his heart to save Snow. So maybe someone else has to do this for someone perhaps Henry or David?
By the way who taught Rumble how to take a heart?
You know why didn’t the writers get on board and write all the episodes right away this is kind of silly that they don’t have more scripts or episodes ready to go in my opinion.