I'm not convinced this makes sense. Mexico and the other successor civilizations in your examples are distinct from the ancestor civilization precisely because those ancestors collapsed and were conquered by others. If you survive until the successor's spawn date, there's really no reason to force characteristics of the successors on the ancestor culture, except as a gimmick to allow play. I doubt that adding this gimmick would be worthwhile. Your other ideas for the Aztecs are good! I'm totally in favor of replacing or improving the UHV3 about enslaving European units. It's too luck dependent to be much fun. I also like the spy UU idea. However, I prefer the UHV1 goal to be more specialized (food as opposed to food + culture). Agreed, a sunset invasion goal would be fun, even if not super serious. Agreed also that UHV2 is a bit boring and not even particularly historical—it requires you to build more cities than the historical areas can support. In general, the Aztecs were a very centralized civilization, so goals that encourage a strong city rather than a large empire are better I think. There are lots of different luxury resources in Mesoamerica (especially on the larger map), so there could be a goal about that. It would synergize well with the Oztomecatl UU idea. EDIT: the goal could be something like maximize happiness in your capital city. You could use luxury resources, sacrifices, military presence, pagan temples and other buildings, etc.