Summer Islands [Steam, Official Site], a game inspired by the classic Holiday Island is set to release sometime this year and it seems it will have Linux support. When it does go to Steam, it will be an Early Access title with no firmer date currently stated other than "2018".
I actually played hours and days of Holiday Island and the resemblance caught my interest right away when I came across Summer Islands earlier.
About the game:
Summer Islands – In this diversified economic simulation you have the possibility to build an indescribable holiday paradise. Build cottages, villas or expensive hotels, right on the beach or in the mountains. When a building has been completed, the tourists can come by boat or plane. Then the difficulty begins: build bars, discos, golf courses, supermarkets and many other buildings, which are popular by the tourists and let you as the owner become rich. But do not forget their surroundings. The many catastrophes that can occur and your enemies who also want to depend on the cake. You should always keep an eye on your vacation paradise.
It will have randomly generated maps along with a map editor, but you will also be able to shape the land to your own liking. On top of that it will have single-player with campaigns and online multi-player too.
It's showing up on Steam with a SteamOS + Linux system requirements tab, like other platforms the details haven't yet been filled in but it's a good sign. Not a confirmation though, and their press-kit uses the ambiguous "PC" term, so I've reached out to the developer to get it confirmed. I sure hope so though, because I could see myself spending hours playing it.
Update: The developer has confirmed Linux support.