Maybe HeavenGames can use this idea,maybe not. They've got most of the information from Age Of Empires 3 anyway..so here it is.
Imagine a first-person Age Of Empires 3. Could be called something like Colonies: The New World. You would first start off in France or some other country in the 1600's, loading up boxes and stuff onto a ship. Then you would sail to the New World and start building a colony. You could chop trees, mine for metals, hunt animals, go fishing,and later in the game you could even become a militiaman and an infantryman.
It would be cool to also be able to choose between campaigns, the Europeans or the Native Indians. As a Native Indian, you could do small quests/chores for the village Shaman, hunt, perform rituals, and even protect your village from invading Europeans or other native tribes.
That was just an idea I wanted to throw out there, feel free to comment on it.