Raven Prime
Member
A clash between ISA and Helghast wouldn't really fit since the Helghast have no interest in earth and are in a different solar system. They left earth a long time ago and colonized a planet(helghan) in a different solar system. Earth then sent ISA troops to the Helghast because they got to powerful.
I don't think there will be a link between the Killzone universe and this. Obviously there are some similarities in art though, afterall its the same people working on it.
The people of Earth could've reverse engineered Helghan tech, I mean there are many options. I just don't see why the same set of artists must mean a similar look for the technology.
As of now I don't think there is a direct link, I'm assuming GG would rather create a new universe. But then again it wouldn't surprise me at all if there are slight references. Perhaps they'll leave the matter open to speculation with vague descriptions.