forgive me if this does not quite fit this thread, and for anything I am getting wrong/ already exists in a previous game. Acnh is my first animal crossing game.
This is 100% never going to happen, daydreaming stuff, and probably not a very unique idea, but:
what if you could create a second island to which one of your playable characters would move (or a new character), existing in the same world though, so characters could hop back and forth relatively easily, like harv’s island. And the second island you can build different businesses - like maybe lief and/ or kicks has a store on that island, or label and this Gracie I have heard about but never met, and maybe Brewster, who everyone seems to want so much (and I am curious too) would set up there and either a new set of critters you would have to bring back to blathers or the gyroids, since many people are completing their crittepedias this month. Ideally it would be a more contiguous world, so villagers could also appear across islands. But it would also be independent in the sense that you have a character who lives there and some kind of development storyline and villagers who live on that island (I really want more villagers and it is my fantasy) and more island to decorate and design.
this would not be possible in the system we have now I think. It’s be a huge add onto the game and the only thing I could imagine would be as some kind of expansion offered when with the switch pro (if that happens). But really, never going to happen, and I know that so maybe this is the wrong thread for this random dream of mine. But i just thought it would be fun to share. Be kind when shoot down my dreams please
(I don’t think Nintendo listens at all anyway, especially to an English language forum...but we can dream!)
Also, @xara , the addition of being able to hug my villagers would also make me so so happy! I’d play 24/7. 
their track record for that isn't great. 
