Is it possible to add campaigns to the Supremacy, like the Romulan wars, or the Dominion wars.

We would like to do that but a full blown campaign is beyond the current mission plan. You more likely will need to respond to random events in a number of ways but not a full campaign.

It would be like "historical wars", choose the side and play. eg. Dominion wars - The game starts, you select the Federation. You start off with cannon map (I read that sometning like that was planned), have some ships, stations, and your tech level is developed as they were in that era. Your objective - With the Klingons you must fight the Dominion and their allies(Cardassians and later the Breen). To gain an advantage you must get the Romulans to join you. You will have DS9 and the wormhole in the Bajoran sector (somehow it would be crutial to make the Wormhole the only possible way to go from Gamma to the Alpha quadrant). And you must win.

We've discussed having pre-made canon-ish maps in the game, and a couple of people have offered to make them. In that respect, I suppose you could have a game where you play the sides during the war. This would be an added extra that we would consider doing near the end of Supremacy's development though. The game would never get finished if we started thinking about this sort of thing at the moment.

I know, but I've just had to put the idea out there.

It is a good idea. We will need to have a working game before we can build campaigns.