Some information has become available regarding DLC for Killzone 2. As reported by Joystiq via GameTrailers, the first set of DLC called “Steel and Titanium” will include two new maps:

“…one set on the ISA tech cruiser “New Sun” and featuring more vertical gameplay, and one aboard two Helghast freight trains that can be leapt between, if you’re willing to brave the environmental hazards. Go here and skip to 7:50 to see for yourself.”

But that’s not all:

“Guerrilla boss Herman Hulst went on to reveal that the 2nd DLC pack would include the word “Retro” and would likely include some Killzone 1-related content.”

Based on this, we can probably assume that a few remakes of maps from the first Killzone game are on the way.

-Update: “Steel and Titanium” will be available April 30