Looking back at Vin Diesel and David Twohy’s 2004 sci-fi epic “The Chronicles of Riddick”, I think most people don’t realize how complex and ambitious the movie was. And maybe that was the problem. It was just so massive, and on such a huge compass, with so many things it wanted to tell, that it sort of had audiences running for the hills instead of trying to digest it all. But I loved it, even though I thought its one big failure was just that — it was just too darn complex and expansive for an average movie crowd. So what about a sequel? Well it’s been 4 years, and we haven’t gotten one yet.