@Pouakai: Even in G&K, each new CS was either one that (1) was added to the religious or mercantile category, (2) replaced a CS that was moved to the religious or mercantile category, or (3)replaecd a CS was added as a new civ. There is no precedent for the addition of CS simply for the sake of adding more CS. Thus, we can assume that likewise, because (1) and (2) are not happening in BNW (no new CS categories), that (3) is. It is more logical to assume something that has precedent than something that doesn't. It bugs you, fine, but I believe it is a legitimate method of speculation, and while it's of course not 100% accurate (nothing is) it is probably one of the few truly reliable methods we have (other methods such as "whether the fans want it" or "it has a female leader" only fuels possibilities of civs getting in, but it is far from definite like the CS theory in my opinion). So far the civs we know that were formerly CS (Brazil, Portugal, Poland) have been replaced by CS of their respective types, lending credence to this theory.