Also which of the Chaos gods will we be up against? Bloodthirsty Khorne? Disgusting Nurgle? Oh how about the beautiful Slaanesh? Or the devious Tzeentch?

And since this is a fringe world it must be pretty close to the Eye of Terror, a place no smart man would colonise. So there'd have to be a very strong motive for that particular colony to be that close to the Eye without having been consumed by the Warp.