I am all for a TW multiplayer campaign and I even think it is plausable. Star Trek- Birth of the Federation was a turn based strategy game with real time battles and had a campaign multiplayer feature that was great. It was very much like MTW, but in space. In some ways turns "could" take even longer considering that there were hundreds of star systems and each contained 1-5 planets (provinces). Multiplayer campaigns actualy went very quick.

Something like this, people need to decide on a time limit for turns in advance. A good MP function would be setting a turn time limit and when the time expires the turn is over, like it or not. Of course "battle time" would not be included in "turn time" and it would be a good idea to have a battle timer. If your not fighting a battle, you have more time each turn. If a persons faction is fighting an AI faction, a good idea would be a function allowing the person whos faction is NOT involved in the battle to control the battle for the enemy in place of the AI.

A streamlined managment system would help. Being able to prioritize building projects etc for each province. The "auto-manage" function as it is doesn't really give you enough control. An "empire wide" construction cue would work well- just open the settlements list in the faction section, and use the drop down menus next to each settlement on the list to cue the building or unit you want produced. I also find movement of family members and stacks on the campaign map to be tedious and time consuming. Sure its easy to just click the unit and then click the destination but the unit will not intentionaly avoid large enemy forces nore avoid walking through territories where you don't have permission to move troops.

The campaign can be streamlined enough to make a multiplayer campaign really workable.

sry for the long post, I just think multiplayer TW would be awesome.