I don’t think Hook being paired with anyone–Emma, Regina, Ariel–would signal his departure or continual existence on the show. If Rumple can leave Belle for NL (Rumbelle being one of the most popular canon ships on this show) then Hook could continue on without his lady love in order to help his friends.
I think I said this a few pages back but if Ariel is in NL and in S3 then she won’t be fully developed until the second half. We may get an episode with her in it in the first 11 but she won’t have her own story until the second half.
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"He was a lot of things to me" "The only conclusion was love"