Personally I'm hoping that the Island Sanctuaries will end up as something Stardew Valley-esque that involves clearing out an overgrown farm and slowly remodeling it into something actually functioning.

It would also be nice if the degree of customization was at a level where every Island Sanctuary won't look the exact same when maxed out, but I might have my hopes too high in that regard.

I'm also hoping our friends can come to our sanctuary, because if it ends up as just a solo instance that nobody can join then that'll be pretty lame.