Few moments ago, I have added the new scenarios with the 320 planets galaxy. Finally even I added 10 planets from the new canon. You could see them in Rogue One, Episode VII and VIII. The names from the scenarios add the first letters from the factions which you can choose in these scenarios. Rebels and Empire are in several scenarios, against different factions and even they have a scenario only for them.
You can find it here.
This file adds new scenario Galaxies for the mod, just uncompress it in the folder where you installed the Polaris Sector Alliance overwritting all files.
These files will work with the version 1.06e only and if you have the Lumens DLC, you can play the First Order Scenario. But remember, I have not added the Resistance yet.