In an article at The Hollywood Reporter talking about Riddick, the third installment of the series that began with Vin Diesel starrer Pitch Black, The Hollywood Reporter reveals the first story details of the film:
Though billed as a back-to-basics approach to the character popularized by Diesel, the script features the character — the most wanted man in the galaxy — left for dead on a barren alien planet, dealing with “trisons” (three-legged bisons) and “mud demons.” He must then contend with two squads of bounty hunters, one of which ride rockets called jetcycles.
David Twohy will direct again from his own script.