This was raised in another thread, but I thought the speculation could be fun
Source: https://mspoweruser.com/microsoft-making-horizon-zero-dawn-like-game/
Source: https://mspoweruser.com/microsoft-making-horizon-zero-dawn-like-game/
The job listing is clearly by a G3D recruiter as they specialize in finding game developers for various clients like Activision and Sony. Considering that the post was 2 months ago, it seems that work is well on its way. Hopefully we'll find out more about the game at Gamescom or E3 2018.