Fun thing for OG Star Wars '77 theater goers - seeing it again when it was re-released before Empire & wondering where in the world "Episode IV A New Hope" came from. The big question raised for folks at the time - why IV?
@StrongDreamsW Funnily enough, I've had folks tell me I couldn't possibly have known about the multiple trilogies idea in the early 80's, even though I clearly remember regaling my Mom's friends with that info back then.
@StrongDreamsW At any rate, it's certainly fair to argue that many were surprised by the Episode # add, as the 1980 Time article linked in this thread also indicates. I know my father and I certainly were.
@StrongDreamsW Not sure about "always" ... I don't think we did know when we first saw the "Episode V" added ... but by the time Jedi came out the larger "three trilogies" structure was definitely commonly known.
OK, so I got this backwards. Episode V in Empire, then Episode IV added to the next SW re-release. So the bigger reaction was to seeing Episode V and wondering what the heck that was ...
TOS. But TNG is amazing, not counting the films. TOS and TNG, Star Wars and Empire, Alien and Aliens - it's the first one that does the world and character work that allows the followup to be what it is.
So if Star Trek V had been more successful, would Star Trek VI still have been the final for TOS? Released in 1991, they still could have squeezed in one more before TNG took over ...