rumor mill is now claiming it is an online survival focused multiplayer game.. basically like ARK, without the dinosaurs.
again, no one can name sources, closest you get is claims they talked to "someone close to the project"..

since that usually comes packaged with speculation that the world is going to be "super irradiated and dangerous" because of the timeframe (from the video, looks like 25 years after the bombs dropped) i suspect most of that is just people wishlisting.
that said, the Falllout 4 game engine with its settlement system would be well suited to such a approach, assuming the online aspect functions right. a focus on scrounging and settlement building certainly would fit the timeframe, since there would be very little in the way of large organized communities 25 years after the bombs. especially on the east coast.
though i'm personally not convinced it'll be much more dangerous in terms of radiation.. 25 years is more than enough time for the nastier isotopes to decay to harmlessness. at most you'll likely just have some deadzones around the ground zero points for the bombs that dropped.