The beauty of all of this is that it leaves a lot to the imagination. There's plenty of room for improvisation of the plot line. For example: Has it occurred to anyone that the Superweapon was more of a bomb? Hence there being little or no remains of said weapon following detonation, thus explaining it's non-re-use. Then again it could simply be one of those one-shot pistol jobs, one shot is all you get because the sheer force of the payload ruins the discharge mechanism.
Who says the coalition didn't send off their own desperate colonisation mission?
Who's to say jump holes didn't start cropping up all over Sol allowing the commies to start their own little franchise in Proxima Centauri?
The truth is no-one knows; and nobody can say for sure despite what the many lores of Discovery state. These facts touch on the core of Microsoft Freelancer role-play and it's really up to any brave individual to decide for themselves how it affects them.