Killzone Dev Reveals New IP Horizon for PS4 at E3 2015 - GameSpot

Horizon: Zero Dawn launches in 2016.
Horizon Zero Dawn is an action role playing game exclusively for the PlayStation 4. As Horizon Zero Dawn’s main protagonist Aloy, a skilled hunter, explore a vibrant and lush world inhabited by mysterious mechanized creatures. Embark on a compelling, emotional journey and unravel mysteries of tribal societies, ancient artifacts and advanced technologies that will determine the fate of this planet, and of life itself.

Sony just teased a new Killzone game and it's not just because the Killzone avatar but the obscure person the avatar is named after in the Killzone universe Kenzo Hakan who himself

News - June, 2015

E3 '07: Killzone 2 Update - GameSpot

News - June, 2015

News - June, 2015

Gamescom - Wikipedia

The success of Horizon Forbidden West seals the fate for the future of Killzone

Gamer Geeks — The Geek I/O Network

Every New Game Confirmed at E3 2015 So Far - GameSpot

Guerrilla Games, PlayStation Studios Wiki

New IP from Killzone dev is completely different - GameSpot

Sounds Like Killzone Dev's New IP Won't Be at E3 - GameSpot

Reactions from Playstation 5's debut, by Ryan Berger

Killzone 3 beta test site appears - GameSpot