An ingenious fan theory streamlines Fox's X-Men timeline using one single scene from Logan. Throughout 20 years and 13 movies, Fox's X-Men franchise became increasingly contrived with contradicting events and several timeline changes. From prequel stories to time travel and alternate universes, the X-Men movies sidelined consistency in favor of spectacular battles starring Hugh Jackman's Wolverine and other live-action mutants.
https://screenrant.com/wolverine-x-men-movie-timeline-problems-theory-fix/