i dont think they are going to throw in some lore about the xel'naga and use it for nothing that would be pointless... because oo the xel'naga did such and such or the protoss or any other race found a new design for something.. that would just be like old sc1 then talking about the xel'naga i think if they throw in more lore they are going to be bound to putting the xel'naga in as a race