What happened when the NR was forced off of Coruscant? Did that give up and disband? No, they moved their base of operations. When Courscant is destroyed, the people of the galaxy will get royaly pissed, and the NR goverment will wake up and start going on the offensive and helping the Jedi. And there will still be a ruler over the New Republic. Just because the house is gone doesn't mean that the master is dead. Like I said before, the New Republic will just set up shop somewhere else. Of course both of us are just speculating. Neither of us knows what the author's are planing and what will happen.