Vin Diesel recently updated his Facebook profile with some new thoughts on future installments of the proposed The Chronicles of Riddick franchise. Though the last film arrived in 2004 with little fanfare and not much cult enthusiasm, that hasn't stopped the action maven from contemplating future adventures for his sci-fi hero. Here's what Vin had to say:

The Riddick discussion is about rating now. Though Hollywood likes their PG Ratings, the next chapter in the COR series was always envisioned as an R rating, like Pitch Black. One Studio exec suggested doing both "The Underverse" and "The Furyan", (working titles) at the same time, allowing us an R rating for the first and a PG rating for the second. The good news- David Twohy's script comes in next month.
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No sequel has been greenlit just yet. We will keep you informed as more information comes in.