[@BurningCold] If he did come, it would have been before. At this point travel between the planets is done via wormholes and warpgates, but since a warpgate can only be built to harness the wormhole, and in this case the wormhole itself collapsed, you would have to use conventional engines to get around.

So no they couldn't have arrived. If they have, it would render the plot of the RP essentially useless, with dozens of ships from offworld coming to help the surviviors and provide humanitarian aid.