After hiring two of the developers behind RS: Siege, a rumor started circulating that Guerrilla was working on a new SOCOM.
Though if Guerrilla isn't working on Killzone 4 another developer is cause this is a huge tease. A KZ2-like game on PS5 would be so good.
In case you forgot, Kenzo Hakan is the name of a leaker in KZ:SF (link).
Ah nice spot. Cheeky little Easter Egg, if this is a hint for a new KZ. I'd be down for a new one for next gen.