Sony has a reputation of announcing Killzone when new hardware is available. A trailer for Killzone 2 was released during the announcement of PlayStation 3. Killzone: Mercenary was also in development for PlayStation Vita at the time of the announcement for the handheld.
EDGE is reporting that Killzone 4 is in development at Guerilla Games.
According to the magazine “the bulk of Guerrilla’s staff (is soldiering) on with the next Killzone instalment.”
Killzone 2 and 3′s Senior Producer Steven Ter Heide is added as the game director.
Guerrilla’s studio recruiter Adrian Smith said that “we’ve got to continue the Killzone franchise”, and suggesting that the new Killzone has been in development.