It seems the press-embargo for the streamers was lifted today, therefore we got lots of new info! If you want to check out the new videos, then please see the links for all of them here, and there is a longer discussion going on here.
Among the new information is that you apparently cannot rename cities, that there are 2 Himikos and 2 Prussian Friedrichs and that many civs can be unlocked via ingame decisions. For all other discussion, please check the forum ;).