Summary
X-Men: Days of Future Past, with its crossover between different X-Men movie timelines, played a key role in paving the way for the multiverse.
The movie's utilization of time travel shattered the confines of linear storytelling, expanding the opportunities for alternate dimensions and paving the path for the multiverse.
Wolverine, portrayed by Hugh Jackman, served as a link connecting the original X-Men timeline with the newer timeline. Now, in Deadpool 3, he is poised to enter the Marvel Cinematic Universe (MCU) via the multiverse, providing a poignant farewell to Fox's X-Men franchise.
An X-Men director believes that X-Men: Days of Future Past laid the foundation for the Marvel Cinematic Universe's Multiverse Saga and the increasing use of the multiverse concept in superhero movies and series. The X-Men movies from Fox had multiple timelines, and these two major iterations of the franchise came together in X-Men: Days of Future Past. Although the film isn't a multiverse story, it's apparent how the crossover between two generations of X-Men may have set the stage for future multiverse projects.
In an interview with Polygon, Simon Kinberg, director of X-Men: Dark Phoenix and longtime producer of the franchise, explains his belief that X-Men: Days of Future Past was a catalyst for the multiverse. Kinberg acknowledges that it wasn't technically a multiverse story, but he suggests that it indirectly influenced the popularity of the concept. X-Men: Days of Future Past brought together different timelines in the X-Men movie universe, and Kinberg believes that this unconventional storytelling choice was integral in making the multiverse a prominent element in superhero adaptations. See Kinberg's full statement below:
MCU's X-Men Multiverse Saga Teases Perfectly Pay Off Days Of Future Past's Set-Up
Days of Future Past served as the gateway to new possibilities within the science fiction genre. While it may not have included elements like apocalypses or aliens, the concept of time travel is a significant component of science fiction. This film allowed us to explore new storytelling avenues by introducing the idea of alternate dimensions, which was a departure from the linear narratives typically found on Earth. Although the studio may not have been thrilled about the financial aspect of paying all the actors, the film was a success and one that I take great pride in.
Kinberg's remarks are logical. Despite the absence of any direct links to the multiverse in X-Men: Days of Future Past, the film boasted a remarkable ensemble cast, incorporating beloved characters from both the earlier X-Men films and the younger timeline established in X-Men: First Class. Hugh Jackman's portrayal of Wolverine seamlessly bridged the gap between the two timelines, making him the perfect connective force.
Almost a decade since the release of X-Men: Days of Future Past, there are plans for Jackman's Wolverine to make his way into the MCU through Deadpool 3. With Disney's acquisition of Fox, the focus shifted towards the integration of the X-Men into the MCU. Interestingly, rather than immediately rebooting the X-Men, the MCU has chosen to incorporate them through the Multiverse Saga, providing a poignant farewell to Fox's X-Men franchise. This decision is a nod to X-Men: Days of Future Past, which played a significant role in making the concept of the multiverse popular in superhero adaptations. The return of Jackman's Wolverine, alongside Ryan Reynolds' Deadpool, follows the appearance of a multiverse variant of Patrick Stewart's Charles Xavier and a fake version of Evan Peters' Quicksilver in the MCU. Deadpool 3 is rumored to feature numerous cameos, thereby giving the Fox X-Men universe its long-awaited multiverse event before concluding, with X-Men: Days of Future Past having played a significant part in making this possible.
Source: Polygon