Can we talk about what might be going on in the picture?
Regina and Snow seem hellbent on pulling whatever/whoever is on the end of the rope. But Hook seems to be cautioning against it. My guess is, the mermaids make an appearance very quickly after JR6 arrive in Neverland, and one of them appear as Henry and Snow and Regina are lured into bringing “Henry” on board and Hook’s like, “That’s not Henry!”