Hi murks, Thanks! Unfortunately, it's not planned right now. : ( I think some people have gotten the game partially running on WINE, but there is some sort of bug with it. If I learned how to make the game work with WINE I would.
I realize this is necromantic as heck, but I'm very interested in a native Linux build myself. Uncharted Waters: New Horizons is a cherished set of memories and I'd love to play this game natively. I get that porting Windows games to Linux is a big pain, though.
I suppose if you're interested you could look into MonoGame, which is modeled after XNA and supports a broader range of platforms, including Linux, MacOS, even consoles like PS4 and Switch.