Myself, i think there are 2 options:
Obsidian or Bioware
Since Obsidian already showed loyalty to quikly make a game (It doens't matter if it's a f*ck-up to Lucasarts) and they know the engine. They are the ones with the biggest chance.
The ideal Kotor 3 would be made by Bioware. But Lucasarts needs a developer that they can put pressure on, and that they can blame for a bad game.Bioware doens't like to be pushed around, and does what it likes. That's what makes their games so good.So they won't make K3.
Sorry for the cynism, but since trials of obi-Wan (with Hk-47 ffs!) and kotor 2, i've lost al faith in Lucasarts.
"I think the Devil ****s Dutchmen."