Considering how rare BattleMech Factories really are, i would imagine Robinson Standard Battleworks would continue to exist for the Dragon. Considering this place is on the frontlines, that would short-in up time to get replacement components to units in the field during the invasion. Grant you it will be big target for surviving FedSun units, but more honey lure bees to be swat by the waiting forces. Either way, i don't think its going go away anytime soon. Maybe new Drac designs may appear there, considering we don't know what Robinson Standard Battleworks is producing these days. The old Watchman isn't bad generic troop design to have in the ranks if its still around. Then again the place also know for making the Sagittaire, Atlas, and the Black Knight.
If anything happens, they'll move it somewhere else. If does take a decade to do it.