Maybe we could stat out some stats for Terran infantry units, like the Marine, Medic, Firebat, etc. I myself have been thinking about some Starcraft related lore, like my previous invasion idea. This includes information on various worlds in the Koprulu Sector and the "Alpha Quadrant Raynor's Raiders", a branch of the Raiders that operate in and near the Sol System, including Earth.
I've been learning to play Warhammer 40k. Unfortunately actually getting to play it for real is not a possibility at this time, due to the expense and lack of opponents where I live, but I have been considering the creation of army lists for playing in Coreline, including both modified versions of existing 40k lists and new ones like modern day armies and forces from other sources. It seems that a modern day assault rifle might be treated as an autogun in 40k rules. Sources conflict on the exact nature of "auto" weapons and whether they are equivalent to "stub" weapons, but it seems that it would be the case that "auto" weapons woud be equivalent to 21st century weapons and greater, and stub weapons would be equivalent to 20th century weapons. Effectively a modern soldier would be equivalent in many ways in Warhammer 40k to a typical Imperial guardsman, but the Imperial Guard would at least have superior vehicles, though exactly how great the gap would be in 40k rules between say an M1 Abrams and a Leman Russ I'm not sure. The lasgun and autogun have the same exact rules as I recall, so if we treated laser weapons from other sources as their "las" equivalents there wouldn't be much difference between laser weapons and modern firearms. Ultimately if I were to wargame in the Coreline setting anytime soon it would be with a system that is less expensive to get into and probably more "generic".