In a handy roadmap revealed today by 11 bit studios, you can see that they have loads of plans in place for Frostpunk, with plenty of free DLC.
“The City has survived but that’s not the end of the journey – we are ready for further expeditions. This development road map will give you the idea of where Frostpunk is heading in 2018. We have planned some substantial content updates – unlocking new modes, tools and scenarios – on top of continuous technical patches which will arrive when necessary. It should go without saying that all of those are going to be FREE updates. And we have even more stuff planned for 2019…”