If by "led to a film franchise" you mean "got the second series aborted after writing and casting the first season, and tabled a number of scripts until a writers' strike in the 80s," yeah, Star Wars did that ... as did the failure to launch the Paramount network , the success of CE3K, and a number of other things. If not for this combination of events, we'd have seen a lot more of Kirk's adventures. Whether that's a good thing or a bad thing is up to you.