Theya re all united in one way - they ahte Volourn. However, I plead innonce of anything they accuse me of - espciially handsomeness, genius intelligence, physical strength or anything else I obviously lack.
KOTOR uses a much more basic version of NWN's combat engine due to the lack of combat options and chocies. However, the main udnerlying workings of it is basically the same.
As for Obsidian, I'd rather them make an original game; but KOTRO2 is not a bad way to go if they fix KOTOR's weaknesses. *cough* controls *cough*