The upcoming Star Trek: Section 31 movie starring the Mirror Universe's Emperor Philippa Georgiou (Michelle Yeoh) should mark the end of the controversial Starfleet organization. Section 31 was introduced late in Star Trek: Deep Space Nine's seven-season run at the height of the Dominion War. The off-the-books, amoral Starfleet entity unsuccessfully attempted to recruit Dr. Julian Bashir (Alexander Siddig) into their ranks, before going on to play a pivotal, polarizing role in the war's final days.
https://screenrant.com/star-trek-michelle-yeoh-movie-end-section-31/