is it even possible to make a "mission" with objectives using the galaxyforge?
Mission 1. part 1 - conquer the first two (and/or more) stars that are connected to your gravity well to establish a base of operations
Mission 1. part 2 - colonize the planets and expand them as your majesty/king/conqueror pleases to do
Mission 1. part 3 - engage/contact other civilizations in the galaxy, and sort out the diplomatic consequences your choices will have further impact on the outcome
Mission 2. part 1 - sort your path trough the universe by diplomacy or conquering the other civilizations planets and/or homeworlds
Mission 2 part n/a - the future of galaxy lies in your hands and you skills. (You can write it on paper if you want to.) 
and so on.......
BTW: Anyone talking about SoaSE campaign I think want more story telling and cinematic sequences during the battles. Until we are blessed with SoaSE 2 - The Chronicles of some sort, it's fine by me to stick with the (almost) original to the end.
SoaSE doesn't need campaign, it's fine by me, the hard-top-of-the-notch rts space game I have ever played up to date (with Stars mod 
).