There have been more rumors surrounding Killzone 3 than dead ISA lining the roads of Helghan.  Guerilla Games has been staffing up for a mysterious new title, various Dutch sources have allegedly heard rumors of the project, and PlayStation Magazine even listed it as a possible title to hit in 2010.

Well, he's some more fuel for the Killzone 3 fire - perhaps, even, the straw the breaks the camel's back.  Outsourcing studio Supermassive Games is working on Killzone 3, according to the LinkedIn profile of one of their employees.  The UK-based studio does a lot of contract work for various publishers, and even worked on Killzone 2.  According to the studio homepage, Supermassive Games is currently working on "innovative, publisher-funded, Playstation3 exclusive titles."

Killzone 2 was released earlier this year, exclusively on the PS3.

[Update: Since this news was posted, the listing in question was updated to remove references of Killzone 3.  The original profile follows:]