https://www.pcgamer.com/chris-avellone-reveals-planned-kotor-3-premise-and-it-involved-battling-ancient-sith-lords/

Star Wars: Knights of the Old Republic 2 designer Chris Avellone has revealed what developer Obsidian Entertainment had planned for the next game in the series, KOTOR 3, before it was canned. 

Speaking to VG247, Avellone said the dev team always imagined the series as a trilogy, and started "working on the third game pitch" after the release of KOTOR 2. The plan was for the player to follow the trail of Darth Revan across the galaxy and battle ancient Sith Lords, "who are far more terrifying than the Darths that show up". As well as fighting these powerful enemies, you'd be able to uncover their origin stories, he said.