Well, there are other variables here beyond just the three OT films - as has been mentioned, where does the EU fit in this hypothetical situation? Back in 1991 (after years of there being very little new SW material out there) both "Heir to the Empire" (the first novel by Timothy Zahn in the HTTE trilogy) and the first issue of "Dark Empire" (by DH comics) came out - both were huge sellers, which proved that interest in the franchise was far from gone. And, this led to a very healthy publishing program which included both new and reprinted comics, new novels, etc. And, this was all long before Episode 1 was released in 1999. And, even without the PT, I disagree completely that the OT would have died completely. There would always have been new fans getting interested in the franchise re: their parents, friends, word of mouth, the Internet, etc.