my TOS-Prequel would be...
with a Enterprise which wasnt completed at the time they launched it.
they had to, but it wasnt finished at that time.
there would have been some Scotty-type-guys which are upgrading the ship on tour.
the things on board wouldnt work that properly,
they would have had huge and funny smaller problems because of the technique.
the captain would be the opposite of a military guy.
a womanizer and a not so serious guy.
someone like Tony Curtis.
he had to learn much during the first missions.
a guy which is kore like Kirk, though even more extraordinary.
the ship would have been much more oldschool
and even more like a submarine.
it would have got add-ons during the series.
the clothes would have been more 60s style.
at least the women would have very sexy suits.
they could get plans of new uniforms during the series,
so the characters could hate them first
and got better ones during the missions.
there would be a funny character like data, holographic-doc and the combination of spock & med-doc.
the theme song would be smilar to all the others, but more old school.
the whole series has the problem that they cant show us something which is really new,
cause then it would have been already in the other series.
to compensate that my series would have gone deeper.
it would have shown much more insights, f.ex. in the society of the vulcanians.
they would have been in the cities were we see whats going on there on the streets and so on.
we would also see more of the earth of that time, cause the enterprise wouldnt go too far in the first season.
there would be more interesting crew members except just 1 we have seen.
that would have been my prequel series of star trek (TOS)