As long as CHS is doing their own masters, and not recasting, it's going to be very, very hard to get them on copyright violations for ultramarines, blood angels, space wolves. Those symbols are just too generic for GW to have any kind of claim to them.
Ultimately, there is much more afoot than even this lawsuit. Several companies started making digital rule books and interactive army lists that come with their gaming system. GW is falling rapidly behind the curve and it scares them that they are losing market shares to technology they can't comprehend.