I hope tortimer island is returning. or something similar to this. Bug were how I made most of my bells I can't see fruit being the main way to make bells in the game. That and turnips of course. Idk who knows they may have a new way to make bells replacing the island.
I think the mystery island is going to be the equivalent in NH! You should still be able to catch tons of bugs and fish there to take back and sell but also as we will actually have our own island I?m hoping bug spawns will be greater and maybe we?ll get some new winter bugs worth big bells.