You will *never* see a civ expansion with plagues and/or civil wars. The reason being that Sid has already considered trying to do exactly that and realized that it was a bad idea because no one likes having their 300 turn game ended by their civilization cut in half due to some random number generator.
Personally, I couldn't agree more to this!
... Cultural is probably the best of the bunch, since you work toward the victory over the course of the whole game.
...Religion probably isn't going to have much effect anymore at that point. There needs to be interesting stuff going on besides the carpet of war...
...The beginning of the game is all about possibilities. ...
...Corporations could help.
You might be interested in this proposal (LINK):
I tried to cover most of your requests:
- a (true) Economic Victory to work towards. Not from the beginning, but at least from the middle of the game, when the importance of religion fades away.
- stuff to do worry about.
- new possibilities to enhance your civ.
- well... CORPORATONS!
