Frostpunk: On the Edge is a simple (yet nerve-wracking) end-game scenario offering a small glimpse into the future of New London, and the regime they impose on all of their offshoot settlements. Whatever 11Bit decides to do now that Frostpunk is done with, will most likely tie into the ending On the Edge sets up. Is This War of Mine set in the Frostpunk universe, perhaps? Whatever the case may be, it is genuinely a sad day knowing this is the end for one of the best city builders of the last decade.
Source: N4G PC Frostpunk: On the Edge Review Beyond New London | Vamers