I don’t see them do something with Emma that would require them to do a follow up (even though they did it with Lily, Will, and many other minor characters). They can’t guarantee that JMO will return for additional episodes.
Moreover, Hook is lost in a different realm and tries to get back to Emma had bern done in season 6 and it wasn’t good.
In addition, we won’t be able to see what happens with Emma in the meantime. Are we supposed to believe that she just wait for him to show up and does absolutely nothing?!
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"All your questions are pointless"