Nah, I’m gonna guess it’s the next island before the series kicks into overdrive until the end. Someone floated the idea of it being like Zou - kinda slower, showing the SHP recuperating from the insanity of Wano, maybe facing a villain that doesn’t require them to go all out (or they can watch the giants go in on them), and sets up the remainder of the story. Don’t think there’s any real chance it’ll be relegated to epilogue status, that would be like showing Luffy in Fishman Island for a brief moment immediately after Marineford and then we never see the place again.