Thoughts I've had about where we're headed:

-With the True Sith firmly entrenched in Known Space, there have to be Masters pulling the strings. I dare say that we would need to come up with a couple of them that the others report to(the holorecordings would go to the Masters, who would visit the Sith homeworld every so often to review progress. Why choose this method? They're being ultra cautious so that no one could pick up on their communications, not even Force sensitives, who could feel and/or hear them communicating through the Force). 

-There would have to be a series of events that lead up to a total Force vs. Non-Force war, most of which were put into place by the breaking of the Treaty of Coruscant. With the Empire and Republic destablized so much already by having to defeat the Hutt Cartel AND with the Emperor dead, there might be some in both camps that feel consolidation might be in order. This would be an interesting twist on Knights of the Fallen Empire, seeing as in the official expansion, Republic and Empire forces come together to fight the Eternal Empire. In this case, the Republic and the Empire would join forces to squash all Force Users out of existence. I assume the True Sith would instigate a number of conflicts started by Force Users, including, potentially: 
	-The Dark Council turning on themselves (reasoning unknown as of yet)
	-The Jedi Council divided due to differing opinions on how to have proper relations with the Republic
	-Exploitation of wandering Jedi/Sith who want to fight for a new cause 
	-Deception of younger Jedi/Sith who can be persuaded to lash out against a society that "oppresses" them("How dare they limit your power!"

-I would think that Yerbol and Aria would return to find the Council divided due to Republic and Empire officials hosting "peace talks" without them. Maybe the True Sith planted on Tython would begin to stir up rebellion and talk of overthrowing the Masters. This would spur Yerbol and Aria to try and unveil the True Sith, only to be foiled by knowledge that the Jedi Masters would be placing the entire planet on an enforced lockdown of sorts in order to discourage students from leaving. Essentially what would we have is a miniature Jedi civil war, with the True Sith Master leading a continent against the Jedi Masters. Yerbol would want to side with the Masters, but probably would see the big picture and try to get off world in order to expose the True Sith's plot to the convened Empire and Republic forces. 

-From there, we could have them sneak onto the planet the meeting is being held only for the duo to be captured and held up as examples of why Force users need to be "systematically eliminated", seeing as they would be framed for trying to assassinate the officials gathered. The duo would break free and then might need to check up on Aria's Dad on Korriban. 

That's what I've got so far...thoughts?