DC FanDome proved to be a huge success, providing exciting details about Warner Bros.' upcoming projects. Among the films teased was The Flash. While no footage was released for the Andy Muschietti-helmed film, as it has yet to begin production, art featuring Barry alongside Michael Keaton's Batman did appear, as well as the design for the Scarlet Speedster's new suit. However, the explanation for his new costume might've spoiled a detail about the film.
Enter the Multiverse
The Flash will draw inspiration from Flashpoint, a story in which Barry Allen tried to prevent the death of his mother, ultimately resulting in the timeline being altered in the process. On top of that, The Flash's panel at DC FanDome indicated that the movie would see the start of a DC Multiverse, with multiple iterations of characters like Batman set to appear. With all that in mind, it's possible Barry's new suit may indicate the end of an entire universe, as well as a beginning.
The new suit looks inspired by the suit the Flash wore in The New 52 immediately following the Flashpoint story. Ultimately, this could mean nothing, just being a fun visual reference to the source material. However, it could indicate that The Flash will draw inspiration from the New 52, and if this is the case, it's possible the world Barry returns to after his adventure might be one that's different in more ways than one.
Don't Call It a Revamp
If The Flash does rewrite reality, the result won't totally change the DCEU. Instead, it's more likely to be a shift of sorts, altering the universe so as to accomodate what audiences have and haven't responded to. Movies like Shazam 2 and Aquaman 2, which be released following The Flash, will be able to stay in continuity, while Ben Affleck's Batman can be given a proper send off that doesn't necessarily involve killing him. What will most likely happen is that, much like in X-Men: Days of Future Past, alterations will be made to the continuity that help it evolve.
At this point, it's impossible to predict the changes that will be brought on by The Flash. Any alterations might depend on how people react to new content going forward. For example, if fans have an overwhelmingly positive response to Zack Snyder's Justice League, there's a chance it could become more integrated into whatever canon is established. If not, then expect changes that are maybe more reflective of what audiences are clamoring for.
Directed by Andy Muschietti with a script by Christina Hodson, The Flash stars Ezra Miller as Barry Allen. It is scheduled to arrive in theaters on June 3, 2022.