Killzone 2 features cave spiders but no Helgan attack dogs?

http://www.psu.com/Killzone-2-features-cave-spiders-but-no-Helgan-attack-dogs--a0005986-p0.php

To this day, it is still unknown whether or not the Helgan attack dogs from Killzone: Liberation will make a comeback in Killzone 2. However, we can reveal that one organic players will be facing off against is the giant spider.

In a recent gameplay video, there is a three second blip where the player encounters these creatures within a tunnel. As the player approaches the tunnel, these oversized arachnids scuttle across a stack of boxes and move to attack the squad.