I still think that's probably true, but I won't tell Vin Diesel, who is determined to make two more sequels happen. In an interview with MTV, he said that writer-director David Twohy is currently working on the scripts, and that the "only question" is whether they will be shot together, LoTR-style, or as two separate productions. Why did it take so long? No money problems, Diesel insists -- they just want to get it right. This was, after all, envisioned as a trilogy, with Pitch Black acting as a stand-alone companion film.
I've wasted a lot of breath defending The Chronicles of Riddick to naysayers, and have pretty much accepted that the film will never meet with much popularity. (My hopes that it would become a cult hit on DVD despite its initial chilly reception have been cruelly dashed, though the spin-off video game proved popular.) I continue to think that it's an ambitious, genuinely interesting piece of science-fiction and world-building. So I'll gladly get excited for sequels from the same creative team, even as I harbor doubts that they'll actually get made.