Today, during Playstation’s E3 2017 press conference, Sony announced DLC for Guerilla Games’ action RPG Horizon Zero Dawn, The Forzen Wilds.
The Frozen Wilds is the first major piece of downloadable content for Horizon, it takes place in a new snowy region. The DLC will star protagonist from the base game, Aloy. It seems the DLC will incorporate new weapons, enemies, and armors.
Apart from the brief trailer you saw above nothing much about the DLC has been revealed yet. Also, we know nothing about the timeline of the game.
Horizon: Zero Dawn The Frozen Wilds DLC will launch later this year on PlayStation 4.