Yesterday we learned that Killzone: Shadow Fall will have a feature called Warzone where you can design the multiplayer matches. You can pick the number of players, rules, mission modes classes, abilities, and weapons that can be in the match, then share your gametypes with other players.
It seems Guerrilla Games wants some serious longevity with they've also announced that their future downloadable content multiplayer maps will all be free. That's a pretty sweet deal, and makes for a really good incentive to play as everyone else charges for their extra maps.
\ We've blogged about this before: read (21) back stories