I've actually maintained quite often that the pilot episode is actually the finale of an unseen season. The impact of losing two main cast, beloved characters in Kelso and Mitchell, and maybe a slight retcon giving Dehner a bigger previous role, can change the perceived impact of the events of the pilot immensely. I would love a fan series to have tackled a set of episodes with Spock as a new arrival, more of an outsider; a main cast that included Lee, the Doctor, Gary, Kirk Dehner and maybe Sulu, Smith and Scotty.
Star Trek-Season Zero?