Here are my ideas :
Act III : Diamond
French :
Campaign about French Vs Russia in 1812 with Napoleon who is one of the main character. You will mostly play in Industrial Age and in the end only imperial.
England :
Campaign about the hundred years war with the England.
Portugual :
Orange War about the independance of the Portugual.
Suedish :
About the War of Liberation (Independance)
Spanish :
War against Portugual for destroy the civil war about the independance.
Russia :
Russia Vs Turkish about the Turkish who want the Russia.
Spanish :
War against Portugual for destroy the civil war about the independance.
Act IV : Lapis
Aztecs :
Like AOE2 where you will fight the spanish.
Inca :
The story is the same with the conquistadors.
Dakota :
Story about the fight for take over a forteress who explote indian like slaves. Where you will
fight the americans for free your people.
Act V : Fire
Ethopians :
Story about Ethopians who will fight Italians encouraged by the Pape.
Haoussa :
Story about them against England and Ethopians.
Mexico :
Story about the Independance of Mexico, you will fight the spanish.
One Big ideas i had, encourage people to create those campaigns. Like you make a topic about you encourage people, making campaigns you want.
You can give the assets, and the winner win a prize and his level are in the game, but it will be good if some developpers could make those campaigns too. Historic battle are less interesting than campaigns, campagins in Age Of Empire III are more alive, with dialogue, story, voice, sounds, itās like a movie, this is why transform historic battles into campagins.
Age Of Empire III is for me the most beautiful game you have created so make it more beautiful by this.
Thx for reading me what do you think.