The package is absolutely insane, including a Helghast's mask, action figure and art-book. Guerrilla have also announced a steel-book edition of the game which includes the game, a dynamic theme, soundtrack and retro map pack. Naturally the Helghast Edition gets all of that too.
Select retailers will be offering a pre-order bonus which includes a 24-hour abilitease of all Killzone 3's multiplayer unlocks, the ability to level up quicker and a bonus three weapon points.
There's more information over on the official Killzone.com website. No price or release details yet.