Actually, in my opinion Pitch Black was one of the most surprising sci-fi films we had seen in a while when released, as well as also probably being one of the better sci-fi based movies for the year 2000.
In any event, The Chronicles of Riddick is supposedly aimed to be the first of a trilogy if the movie should do well, make enough money, and provoke enough interest for a fan base. But before we get there, we have The Chronicles of Riddick sequel to Pitch Black, in light of the surviving characters continuing their story 5 years later... but that is about the extent of the connection. The Chronicles of Riddick is supposed to conclude a new adventure, where an escaped convict finds himself in the midst of a galactic war and captured by one of the opposing forces. More I will not say... watch the trailer. If nothing else, David Twohy has always provided interesting writings, and his composed style for Pitch Black was kinda different and nice for a change.
So, I guess we will all just have to watch the movie and make up our respective minds.
<edit>Sorry, Vonbloodbath had just beat me to the post</edit>