I was wondering, as RTS strategy game goes (especially if you plan multiplayer action), you have to close a game within 3-4 hours (or less. 4 hours being real huge games). What do you expect to be the lenght of a multiplayer game?

In the solo-mode, do you plan a huge campaign on the same map?
Do you plan to include "sandbox" battles, à la GalCiv2, where I begin with 1 planet, and have to conquer the whole universe?
Or will Sins of a Solar Empire will be more like a StarCraft-like kind of game, with several separate engagements?