As far as what I know and what I've heard,KOTOR III is most likely to be about Revan & the Exile in The Sith Empire.Fighting the "True Sith" according to Kreia.
What should be added is lip sync.(Getting tired of the same mouth movements from every character <_< )And emotions on the characters face to match the tone from the voice actor.New planets such a Corosant,& some Sith planets such as Vjun,mayble Thule.Bring in some new characters & some old.(especialy the droids)
Quite possibly coincidence.Alot of SWEU has similarities between each other.For example,the Ravanger in KOTOR II is very similar to the Imperial Starship.