Imperial cards should be implemented for all civilizations. This would make treaty games more interesting.
The ‘Battleship’ New ship spotted in the scenario editor has been highly requested as an affordable unit playable in multiplayer matches. This ship could be such a shipment. I think it would be a good way to implement imperial cards. New elite units for each civilization and powerful new technologies.
We would have to expand the deck to 30-35 cards, but keep the total 25 until the industrial age. Imperial Cards Suggestion