Well, there are six civs left, two major features to discuss, and two scenarios. Also, unless they answer it during the Q&A, we only have the leaders for two of the civs revealed. There are about 14 weeks to give out info. I would suggest that the two scenarios will be discussed together, but the two features will each have different articles focusing on them (ideologies can be done in print, but I really think archaeology needs a video to truly grasp it).
I would say this points to about four major revelations of information. That means something every three weeks or so. At least, that's how I would approach it. You'll start getting the game review companies writing more in depth reviews and they're going to want something exclusive, so that's how it'll start appearing.