Usually we take rumors lightly, but this one supposedly came from the Official PlayStation Magazine(UK?). A forum member at Killzone.com claims to have gotten his hands on the latest OPM- issue number 14 which contains some interesting snippets regarding Killzone 2.
• Killzone 2 also promises the inclusion of player-controlled vehicles
• Public beta test in mid `08
•"We asked deJonge to tell us a secret, "As you know, they [Helghast] are not the only inhabitants." He won't be drawn on whether those 'other' alien inhabitants are friendly or not.
This isn't from the North American OPM publication, as we've already gotten our hands on the latest issue. We want to know more and we'll let you know if there's any truth to this as soon as possible. Stay Tuned!