humble minion
Legend
Were the Denning novels really that bad?
In my opinion, yes. The characterisation was one-note and cartoonish, the character development was ham-fisted, the plotting was ponderous, the prose was adolescent at best, the internal setting integrity and logic was extraordinarily wobbly, and from a gamer's point of view (rather than a reader's), the whole series destroyed some of the major underpinnings of an interesting, compelling, unique game world. There were some imaginative setpieces and concepts (I think Denning would have been a good GM), but these were wasted opportunities.
Does this mean they are good in general, or just the best of the Dark Sun novels? How well did they stay on canon or was there even much canon at the time they were being written?
I think 'best of the Dark Sun novels' depends on what standards you judge by. Alzrius and I obviously differ!
As far as canon goes, strictly speaking, since the novels were one of the first DS products (though the first of the modules fitted in pretty tightly with them - PCs playing in the modules got to watch as the novel characters went through the first couple of novels) they DEFINED canon. Later DS products, both in the novel and the game line, followed their lead, even though their lead invalidated massive chunks of the newly-released campaign setting box.
The Pentad used canon (from the boxed set) as a starting point, but by the time they finished, that canon was pretty much unrecognisable.
At this point in the whole thing, will current canon be that important if they will be renewing it as a 4e setting? Maybe, because they are reprinting the Denning books, they are setting up the foundation for the setting to match what is in his novels?
[just speculation]
It's possible. Given the 4e '3-book' campaign setting model, I wouldn't be surprised at all if DS sees the light of day in some form. Won't be til after Eberron at the very least, and possibly Ravenloft or Dragonlance or a new 4e setting though. I expect it to get a very major reboot if it does, though.