Once the peak of ongoing superhero movie franchises, this is how 20th Century Fox's truly was X-Men that started it all.

The first X-Men movie hit theaters in 2000 to great acclaim and box office success. Fox moved quickly to get a full trilogy of films out in theaters by 2006, but X-Men: The Last Stand left a sour taste with audiences. In an effort to reinvigorate interest in the franchise, Fox turned to the clear star of the aforementioned trilogy, Hugh Jackman's Wolverine. He was given an origin movie three years later, but it also didn't sit well with fans, forcing Fox to once again change direction.

Related: The X-Men Characters With The Most Movie Appearances

Instead of operating with a clear - or even rough - plan, the last decade of the X-Men franchise has seen reboots, prequels, spinoffs, and standalone films all mixed together. Standalone films like Deadpool movies found great success telling their own stories and free of any continuity, but the draw of the franchise is supposed to be the main series. Unfortunately, as discussed in the latest Screen Rant video, a lack of a vision and lesser quality of the main franchise led the once great X-Men series to quietly meet its end.

Fox X-Men Universe Dead

The X-Men franchise got its soft reboot in 2011 with Matthew Vaughn's X-Men: Days of Future Past. His rough pitch was made as the second film in the new series with Bryan Singer returning to direct. The movie was a hit as it brought the new young cast together with the original franchise leaders.

But the problem with Fox's decision to rush to X-Men: Days of Future Past was that it left the ongoing franchise without a Dark Phoenix.

Whether it was from a lack of build-up to a second attempt at The Dark Phoenix Saga storyline, audiences not feeling attached to these new characters yet, or the likelihood of a The New Mutants is currently set to hit theaters next spring, the main X-Men saga is over after this slow crumble.

MORE: Marvel May Not Release An X-Men Movie Until Phase 6