It's 50-100 years after the apocalypse and nature has completely taken over: huge cities are partly buried or partly flooded, big lakes have dried up leaving ships in a dessertlooking wasteland, in the middle of the woods you can find carwrecks, airplane and helicopter crashes, broken houses and in some places there is a hatch in the ground. This hatch is the top of an apartment that is completely burried. There are primitive villages made out of metal or wood (metal houses from Livonia) made by former communities. There are huge bunkers in the mountains which take over the role of the airfields/military bases. It's a completely new world with a shadow of the old one.
The map would be mostly pve like livonia but hunting/fishing and crafting would be the way to go. As there wouldn't be too many guns I imagine people using primitive weapons making teamwork and stealth vital. Might not be a great map for pvp but would be awesome for pve and rp.