Personally, I think that multiplayer mods have been given too much attention. Sure they are fun, but not everybody has the fast internet connection needed to really enjoy them. Besides, there are so many incredible stories that can be told through single player mods. And Star Wars has always been about story more than combat. Battles add flavor to the story but are not the end-all and be-all of it.
In Jedi Knight, not every NPC encountered was a hostile. And there were consequences (though understated) for killing them.
Personally, I hope that JK2 will bring more of a roleplaying feel than its predecessor, making it easier to get immersed in the world of the game.
All I have is a 56K dial-up connection to the internet, and because of my location, I doubt that I'll have access to anything faster for a while. So I'll be doing the single-player scene mainly.
If NPC AI is good enough, with strategic level design, single player mods will be quite challenging... We'll just have to see, now won't we?
G. B. Jackson (firstname.lastname@example.org)
Administrator, The Diversified Community of Game Developers (DCGD)
"E Pluribus Unum..."