Excerpt: There are many types of sequel in today's media. There is the blockbuster sequel, which improves upon its predecessor in every way. The lackluster sequel never manages to capture the spirit of the original. The cash-in sequel is made as quickly as possible simply to make a buck off previous success. Then there is the infamous unidentified sequel, a work of such dubious quality that its title is changed in order to protect the sanctity of the franchise.