So I've been thinking about possible scenarios that could play out very late (1-2 years) in a Project Zomboid run. Most of my ideas involve NPCs so this isn't something that could be implemented anytime soon, but are food for thought for later.
The first one is strategic strikes by US airforce and artillery to destroy remaining hotzones or again draw zombies to specific areas. Or also to destroy player made hideouts.
The second is the introduction of strike teams into the exclusion zone. These teams goals are to clear an area to allow researchers to set up labs for research of the virus. These teams, however, are going under the assumption that anyone that has survived thus far is either a prime candidate for study, or is hostile. I.e, they will capture or kill any survivors they come across. If they come across hideouts, they might stalk them from afar to see if anyone living still inhabits them. And of course they used silenced weapons and are very good at killing infected for study. They'd pose an extreme danger to survivors to the zone, as they'll be heavily equipped and very hard to fight or evade. They'd also have a chance to invade the player's living space while they are asleep (either to capture the player or to take note of survival techniques). It's very critical that it is clear these strike teams are not there to provide benefit to the player. They are strictly hostile and provide a late game challenge to overcome or avoid.
The last idea revolves around natural disasters. Mainly heavy storms that can damage structures or make daily life more difficult. These can take the form of severe thunderstorms, blizzards, earthquakes, or even nuclear fallout (from areas outside the zone possibly getting nuked for containment or a nearby reactor failing).
What are your guys thoughts on possible late game events?