That’s a cool idea. Honestly you could’ve had something similar to what was already in the films. The First Order could’ve been your Imperial Remnant, fighting with the New Republic, then a Sith Cult out in the Unknown Regions introduces a new threat that brings the two factions together. Maybe they wanted to resurrect a Sith Lord and begin a new Sith Empire. Could’ve been Sidious, or Darth Bane, or a brand new guy.

That is one major thing I wish would’ve been different. If they just had to bring back Palpatine, I wish the plot would’ve revolves around the cult trying to resurrect him and the good guys trying to stop that, rather than him physically existing out in the Unknown Regions all this time.