Board Thread:Spoilers!/@comment-5899967-20170704181208/@comment-1916997-20170705124714

Another possibility is Emma (with a CaptainSwan baby/child), Snow and Charming (with Neal), Belle (with Gideon), and Zelena (with Robin) are still in SB, and Henry, Regina, Hook, and Rumple went to EF or something to deal with a new evil, only to get cursed to a new town. The curse has wiped the memories of Henry, Regina, Hook, and Rumple, so they obviously wouldn't be contacting the SB people, and Emma, Snow, Charming, Belle, and Zelena assume that the battle in EF is still happening, and they will return when they are done. This is actually a really easy way to explain why those 5, as well as other recurring characters, and SB are not going to be seen (or seen very often).