I haven't been keeping up too well with the rumors about how distribution of this new content is going to come about, but if it is in this same kind of track where they release 2 civs and maybe a scenario each month, I think that they should stick with their prior theme and keep it in the same region of the world/civs that are related in some way. I also think that it would be great for some of these packs to include one new civ and one alternate leader for an existing civ. I.E., we could have a pack in which we get a new Byzantine leader along with an alt for Rome as those areas have historical ties to each other, or maybe something like an alt for America with a new leader for people groups somewhere like Hawai'i or the Philippines, places where the US took over. I think this would do a great job introducing more new leaders, which we of course want to see, as well as alt leaders without having them as a bit less exciting additions in major expansions. Price point could also be a bit cheaper than the current 2-leader packs to reflect this.