The Flash is said to “reset everything” according to James Gunn himself – here’s what that means for the DCU’s future. As Gunn had promised at the end of 2021, the initial DC Studios’ slate was released, revealing part of Chapter 1 of the new DC Universe called “Gods and Monsters.” Listing live-action movies, live-action shows, and an animated series, the DC Studios slate reveals how massive of a change this new DC Universe is – including the previously announced Superman reboot and a new Batman movie with no ties to Affleck, Keaton, or Pattinson. That said, DC has four movies releasing in 2023, including the time-traveling, multiverse adventure The Flash.
https://screenrant.com/how-the-flash-movie-will-reset-dc-universe/