For those keeping track The Flash was originally supposed to come out in 2018!
Reported in 2014 So by 2023 it will have been 9 years since it was reported to come out in 2018
https://variety.com/2014/film/news/the-flash-movie-ezra-miller-aquaman-jason-momoa-2018-1201330654/
You have to admit that it's a miracle that Ezra has stayed attached to the movie. He's outlasted 2 or 3 directors and script rewrites. You would expected Ezra to have dropped out in the third year of this movies development due to no movement on it.