For all the speculation, it seems to me that some things are absolutely unavoidable if it's to have the Civ branding:
- It will be turn-based (been there in every version since Civ 1)
- It will have named civilisations and leaders (ditto)
- It will have science (ditto)
- It will have happiness (ditto)
- It will have cities (ditto)
- It will have military units (ditto)
- It will have wonders (ditto)
- It will have workers to develop the land, and scouts to explore it (ditto)
- It will have difficulty levels (ditto)
- the AI will be stupid, and rely on cheating (ditto)
What made Sid games stand out
then (1990s) was the cartoonish simplicity of execution (graphical and mechanical representation), but of important historical concepts to understand and learn. Concepts perhaps simplified and presented in a fun way, but
on point.
Lets take just the very first of it's breakthrough concepts:
the unknown.
A settler, a tiny patch of green land, some
blue (be it a river, or body of water) and lots and lots of BLACK. Your whole screen is black. Except for the tiny speck of colour in the middle. This blackness has a huge psychological effect. Your first urge is to remove the darkness, to explore the unknown, to know more, to see where you are in the world. Is there anything else out there?
What you can do and should do, with modern technology, is to add onto this concept. Imagine if you suddenly saw a huge storm in that blackness, a storm that occasionally reveals, for brief moments, lands in the distance. Perhaps it reveals a village, or an unnatural feature. You send your braves in that direction, they reveal just the path behind them, but you send them into this black. They suffer animal attacks, growls can be heard in the distance. And then they reach a chasm. A dead end. They need to either turn back or change course. But they are running low on supplies, so you need to either make them the forage, or return to camp.
You can't just turn this black into white, like they did in civ5 and 6, and make units YOLO their way around the map, discovering a billion hexes every turn, because that already breaks one of the core tenets of the Civilization franchise: the beauty, dangers and necessity of exploration.
So... no. I'm not sold on the idea that recent Civilization designers "nailed" the core principles of the franchise and what made it great.