Riddick would have been decent if this were not the third film in the series. I felt like I was watching Pitch Black all over again. It's almost the exact same plot structure as the first film. Capture Riddick, he outsmarts everyone, attacked by alien creatures, escape the planet. We've seen this all before to a degree. I wish I could say there's something new to this story that's appealing, but there isn't. Riddick is essentially the same character dealing with the same problems he had previously. I get going back to the well to satisfy the fan base, but Diesel and Twohy needed more to keep it interesting.
Riddick has a nominally hard R rating. The last film, The Chronicles of Riddick, was PG-13 and tame, despite having an actual plot. Twohy ramps up the carnage and skin here. Sci-fi fanboy favorite Katee Sackhoff shows some side boob in a scene that has no merit whatsoever. Her character is purely a sex object and subject to infantile harassment throughout the flick. That's pretty disappointing, especially when the female characters in the previous films had at least something to do with the story. I have a distinct feeling that Twohy has her character in mind for a sequel to this film, if the box office warrants it.
Riddick disappoints. I'm a fan of the first two films, despite some flaws, and actually had moderate expectations for this reboot of sorts. Sadly, there's nothing here that warrants a positive recommendation. Although I'm sure the Katee Sackhoff fans clamoring for side boob shots are already in line.