Killzone 2 isn't out until next week, but already rumours surrounding post-release DLC are flying around.
The most interesting of the rumours are of plans to add an in-game store to KZ2, similar to Metal Gear Solid 4, in which you'll be able to buy new clothes and upgrades for your player (presumably in multiplayer), and that Guerrilla has a retro level pack planned, containing multiplayer maps from the first game.
It's also reported, according to an "anonymous source", that Killzone 2's post release DLC will include new multiplayer maps and modes, and a mix of free and paid DLC is planned, although that's more obvious stuff.
Game director Mathijs de Jonge last month shot down re-occurring rumours that Guerrilla planned to add co-op gameplay to the main campaign via a post-release patch.
We've contacted Sony for a response to the latest whispers.