I’m a little late to the party but here it is:

If you were not amused by Vin Diesel’s character from Pitch Black and The Chronicles of Riddick don’t bother seeing this movie. Riddick picks up from Riddick’s reign as the lord of the Necromongers. This film doesn’t spend the first five minutes explaining his past. It just jumps right in assuming you’re a fan. It’s a little slow in the beginning reestablishing Riddick’s lone wolf persona, but with this installment you’re getting more action, more suspense and a new planet with some strange creatures on it. Now that his interplanetary reputation has gone from menacing murderer on the run to the crowned leader of an invading army, Riddick’s every move becomes legend. Enjoy the ride.