the leaving cast potentially returning

I feel like with the story, and the move to Fridays, we're being set up for this season to be the last. I think the cast that's left will be worked into the plot as missing or something. Because those we have remaining would have good reasons to search. Henry's mom and grandparents and nephew. Hook's love. Rumple's love and kid. Regina's sister and niece. Would also like to see Robin Hood worked in. I know many fear that Emma coming back for one more episode means she'll die, but I more think, in a show that's perennially about hope, it'll be the last episode of the season, when they're found and saved, and set things to rights again. Would kind of mirror Season 1 in a way.