Is there a link to a site somewhere that I missed that has the SW Cannon? I would like to read it. Or is it just what the starwars.com site has in its database? I do know about that place.
I would conceed that the comics themselves could easily not be part of the Cannon, but the lore (what I mean by that is basic story line) they held is. There are enough instances of these events and characters being referenced in Cannon (at least what I understand is Cannon like the novels, starwars.com and such) that the basic story is accepted as Cannon, just perhaps reinterpereted a little different.
Another example of this is the six childrens books that tell of Luke discovering a 'lost city of the jedi' underground on Yavin 4. Reading them in light of the regular novels and cannon make them a joke though. a Jedi city buried under a planet that was basically Sith controlled? Why were the rebels based on Yavin again after the battle of Endor? Lando in charge of Cloud city after the Empire kicked him out? I could go on, but when I read Bastila_Shan's posts about 'cannon' Sith history I was suprised to read of things that this little series contained: Kadan and Jadgar and the Prophets of the Darkside, the glove of Darth Vader, Triclops. These childrens books were written in the early 90's as well. I don't think that there were any stories of theres things before the childrens books were published (they don't even have a series name for them to my knowedge).
Sorry for the rabbit trail but it does come back to a point I wanted to make: Just because something may not be official 'Cannon' does not mean that it could be used as reference material. KOTOR used characters from the comics (heck Exar Kun and all of the other characters I mentioned earlier were INVENTED by the comics), Exar Kun was in the Jedi Academy book trilogy, The New Jedi Order and Dark Nest series of novels includes Kyle Katarn, a videogame character. and the Novels also include Cam Soulsar who was introduced in the Dark Empire comics to my understanding. And even in Episode 2 during the arena fight scene the green horse-like-headed jedi that is shot off of the balcony by Jango Fett is the same race as one of the 'Golden Age of the Sith/Fall of the Sith Empire' comic characters.
So granted, the comics, among other star wars media, may not be 'Cannon', but it has been used as reference material and has even formed the back-bone of what became Cannon Star Wars lore. So I think its safe to bet that the 'true sith', if they appear in the much anticipated KOTOR 3, would be based somewhat on previous images they were portrayed as.
Wow I write a lot!

Though I do love cross referencing the Star Wars universe. That was a highlight of KOTOR for me.