I guess I don’t feel like the EF is going to be their home in the end. I feel it is going to be SB somehow. That town just keeps coming on back and it is kind of a character in itself. It is also what makes this story feel so unique. If they end in the EF it feels like it just loses some of the “modern spin” aspect of it.
I like the idea of everyone sort of choosing to settle into SB as a permanent bubble town with new stories waiting to unfold for them at the very end.
I do think they’ll “go to Oz” at the end of S4 but they want to have time back in SB for a bit. I’m not sure they’ll do the trip to Oz like the trip to NL where only some characters go but it might be more of a flashback thing as more things happen in present day SB. I’m not sure really.
I’m not sure the writers are sure even. If they don’t have permanent word yet of 2 more seasons then they probably are going a bit cautiously. Writers will sometimes have back-up plans in mind so that if it is the end of the (yellow brick) road, they can wind it up–or sometimes they take a gamble and it ends on a total cliffhanger to the frustration of fans for ever more.
So one possible title could be “End of the Yellow Brick Road”
“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass