it goes much deeper than you think. I'm sure most of you remember the movie (starring none other than vin desiel) it was a decent movie. nothing to remember. till today. (well if you even care at all)
First they are making a sequal of sorts
the chronicles of riddick
Second they are also making a Prequal video game to the movie(s)
The Chronicles of Riddick: Escape From Butcher Bay
which also looks bad ass.
and there is a 3rd movie on the way too but I dont know much about that one.
enjoy if you want.