I actually got really bored a while ago and started writing up an entire alternate universe to accomodate my own head canon. It all started when I tried doing a creative writing exercise to explain why Starfleet uniforms changed so dramatically between TMP and TWOK.
In short, I came to the conclusion that the number of "alternate" timelines depicted in the various TV and film iterations of the franchise was actually
seven:
- TOS / TAS / TMP timeline: Exploration, peace, post-scarcity economy - the best elements of Roddenberry's original concept
- Trek II–VI timeline: a divergent successor timeline characterized by a militarization spike, command culture shift
- TNG / DS9 / Voyager / Picard / Lower Decks timeline (A later divergence emphasizing post-scarcity politics over exploratory primacy)
- Discovery / SNW / Prodigy timeline: A pre-TMP divergence with early technological acceleration
- Kelvin timeline: A catastrophic branch triggered by confirmed temporal incursion)
- Enterprise (NX-era) timeline: A post-First Contact altered baseline, consistent with fan and internal logic
- Mirror Mirror timeline: a seperate timeline that has bled into two other timelines
It may not be supported ANYWHERE in canon, but it's a fun bit of mental shorthand to explain to my pattern-seeking detail-obsessed brain why there seems to be so many differences between the Starfleet of 2271 and 2285.
Tim