In the Eternity Vault operation, we come face-to-face with an ancient Rakata warlord named Soa who along with several Sith purebloods deemed "betrayers of Adas" (indicating they were on Adas' council) were imprisoned in stasis on Belsavis. However, the Legends material makes it clear that the Sith successfully pushed the Rakata off Belsavis. This would mean that either

 

1) Soa took power for himself and there was a split in Rakata leadership where some supported his attempted coup against both King Adas and the Rakatan leadership, but then why would the Rakata both capture him and his council and bring them to Belsavis if the Infinite Empire was being beaten on Korriban where Soa claims he ruled from? Not sure it makes sense that the Rakata were being beaten but still captured the super powerful renegade warlord and took him and his entire council to the other side of the galaxy

 

OR

 

2) Soa was THE ruler of the Infinite Empire at the time, but this would make no sense given that King Adas and the Sith never let the Rakata conquer them but simply let them come as guests to give them technology (but Soa claims Korriban was his "crown"). But then if Soa and his council of Sith traitors were simply fighting/working for the Infinite Empire, why would the Infinite Empire have imprisoned them?

 

Please share your thoughts.

You forgot Option Three:

 

3) SWTOR is not obliged to follow every detail of Legends continuity, and therefore something else happened.

Option Four; Soa was lying, to try to intimidate or impress, about either or both of his status in the Infinite Empire and Korriban being 'the jewel in his crown'.