Board Thread:Spoilers!/@comment-26443838-20161212210741/@comment-24674051-20170109185435

And honestly, if one part of the story is simply Eric getting around to fulfilling his desire to journey to Agrabah with Ariel (which was alluded to in "Ariel"), then add a half point for story continuity across seasons. (only a half, since it is a minor and irrelevant plot point).

My best guess is that Killian and Emma journey to find Al and Jas (why remains to be seen). Upon arrival (or shorely thereafter) Emma turns up missing. Killian then runs into Jasmine, who had previously encountered Eric and Ariel. Jas is looking to find Aladdin, since he is also missing. The story will be split in two parts. the first part focuses on Killian, Jas, and Ariel trying to find and rescue the saviors, the other part on Al and Emma trapped and trying to escape, and also spouting saviorology stuff to fill in that story line. Backstory may deal with Jasmine and Jafar after Aladdin disappeared, and expose what happened with Agrabah.

I agree that Nemo and Liam are probably there primarily as transportation, though the simple fact that they are back presents possibilities of seeing them again in future episodes.