So far We've got people speculating about the main 4 that are the logical choices: Spain, Persia, the Incas and the Vikings. I personally think if it came down to those four that the Persians would win out, but I actually am wanting an underdog to get in, like Portugal, or the Zulu, or even the Ottomans. But when Firaxis releases the last civ, some will cheer, some will moan, but it'll be all fine in the end when the first, second, and maybe the third expansion packs come out. So, in the end, Firaxis can do no wrong.