Of course, Manhunter is the prequel to Silence of the Lambs.
The new Hannibal Rising movie I suppose would be a pre-prequel, then? haha
A friend and I were up in C-Ville a few years back (this was when I still lived in Athens) and, as a reporter for Flagpole magazine in Athens, he got to attend Anthony Hopkin's press conference at the Virginia Film Festival for Hannibal. So, my friend asked me beforehand what question(s) he should ask, and since the theme of the festival that year was "Animal Attractions,"
http://www.vafilm.com/2000/ I suggested he ask him about any pets (or livestock---thought that would get a laugh) he owned, and then follow it up with a serious question about what he thinks of Hollywood's practice of banking on sequels and what his thoughts were on motion picture sequels, in general. As predicted, the first question was a hit and Hopkins told about his dogs and bird, and then my friend aggressively was able to ask the follow-up as well and the mood turned in an instant. Sir Anthony was quite flummoxed, and, after a slight pause of momentary uncertainty and mumbling something about "not being Tom Cruise," he just flat-out ignored the question and turned his attention elsewhere to the next reporter.