With the miraluka homeworld consumed of all life. Hence visas sole surviving. Isn't that the same dark energy the emperor used to become imortal. Is the emperor as a character linked to the events of kotor2 somehow down the line. I would like to think kotor2 plot somehow comes to the fore in a future expansion.
No, Darth Nihilius did that. How ever the current empower did something similar (although the planet he killed wasn't full of force sensitives).