Do you think the Aztec faction will work?

[Brutus]

Yes, but Cortez conquest was complete by the end of 1521, nine years before the game ends. It was an historical event of profound importance. Honestly, how could it be ignored? It will have to be part of the victory conditions of a Spanish faction, for instance.

Hmm, I think Europeans at the time (especially in 1521) thought other developments much more important thant the conquest of Mexico. The main geo-political events concerning Europeans in the early 16th century mainly revolved around the Ottoman conquest of the Balkans, the Habsburg-Valois rivalry and (very quickly becoming important, but not really before the German Peasant's War) the Reformation. The Spanish conquest of the Aztec Empire was far more important in the long term then it was in the short term, and the impact on Europe was very marginal in the 9 years between 1521 and 1530.

I hope they won't be included as a fully-fledged faction. They would be out of place.