Yeah, in that scenario I mentioned, Hook = Eric. Dunno if they’d go that route of turning Hook into a prince, but I don’t think Eric really has an elaborate, hard and fast backstory, does he? So they could really make him anyone they liked. In both the original by Hans Christian Anderson, and the Disney version, Ariel meets her prince when she saves him from drowning in a storm. And we just saw Hook’s ship go into the ocean, so I’d buy it that he could need rescuing by a mermaid at some point along his underwater portal trip.