Thankfully the answer is amazingly
simple, believe it or not.
Because there are only two timelines in official Star Trek, regardless of the media:
- The CBS timeline – the ‘Prime Timeline’ which basically includes all the TV shows, the first 10 movies (because they featured the cast from The Original Series and/or The Next Generation), and most of the games
- The Paramount timeline (The Kelvin universe from the recent movies, and all the games based on it).