https://www.games2gether.com/amplit...eous-looking-faction-cards-from-stream?page=1
Theres a couple of images there that are almost certainly faction cards for civs that have yet to be revealed just in case anyone here has missed them. The U-Boat image seems to be certainly Germany for the Modern era
thanks! Seems all pretty clear to me except the medieval king, who could be any European medieval civ and the guy with the sword, who might also stand for quite a few ancient or early medieval civs.