Worth, when she was just 19, Deborah Debi Sue? Carrie, this flick originally began life as a Freddy vs Jason movie before negotiations between Paramount and New Line fell apart.
Jason's pretty much a non-factor in the film until the jump scare ending, which is deliberately ripping off from four years earlier.
Despite Paramount's obvious intentions for this to be the last film, it had the save the 2009 remake, and grossed more than Part 2 and only slightly less than Part 3, so they greenlit another sequel.