RobertScorpio
Pariah
We might've also gotten lucky, the displeasure over the direction Freddie Freiberger was taking the show could've been recognized and Gene Coon might've been coaxed back, or Bob Justman could've been promoted to producer in his own right, with the fourth season being a runaway success, leading to a fifth season that either wrapped everything up or a massive recasting with a new captain and crew on another five year mission.
Of course, this would've meant no feeling of mission interruptus, with no frustrated fanbase pestering the studio for the succeeding twenty-odd years demanding Star Trek's return. It would've all been said and done, with the franchise probably closing up shop no later than 1976, notwithstanding the success or failure of any spinoffs that might be attempted, like that "Harry Mudd, Space Pirate" idea they kicked around for about ten minutes. Maybe a few reunion tv movies over the next several years, but nowhere near the behemoth we have now.
So, yeah, even if a fourth season was a success, it probably would've been the beginning of the end for Star Trek.
the more I think about it the more I think you're right...good post...
Rob