Alternate the DCEU
Man of Steel (2013) - Movies the same
Batman v Superman (2016), same movie, but instead of Dick Grayson being the dead Robin, Jason Todd would be
Suicide Squad (2016) - Same team, and film, but more to Ayer than it was, no need to confirm that Harley was involved in Robin's death, that was an error because she would have been around 15
Wonder Woman (2017) - Same movie
Justice League (2017), more akin to Snyder's film than Whedon's, Cyborg would still be the stand out
The Flash (2018) - Was meant to be the first to be released after JL. I' between a story of Barry learning more of his powers and his fight for his father's innocence and a Flashpoint-esque story.
Aquaman (2018) - Movie's the same
The Batman (2019), Affleck stays, Deathstroke is the main villain, Nightwing and Batgirl make debuts, Joker, Black Mask and Harley appear in supporting roles to set up Birds of Prey.
Shazam (2019), same film, but actually have Henry Cavill appear as Supes
Man of Steel 2 (2019) - A sequel focusing on Clark struggling in a world where Superman is back but Clark Kent is dead, Brainiac is the main villain
Birds of Prey (2020) - Mostly the same
Wonder Woman 2 (2020) - May be a different movie to 1984, Cheetah still appears, Circe is the main villain, possibly no Steve, instead Brian Elliot and the Justice Society members Hawkmana and Doctor Fate appear.
Justice League 2 (2020) - More of the Legion of Doom appearing, then sets up Darkseid, Hal Jordan and John Stewart appear.
Green Lantern Corps (2021) - Hal Jordan and John Stewart are the main characters, it's a buddy movie like Lethal Weapon and 48 Hours.
Suicide Squad 2 (2021), James Gunn still directs, and still the same movie
Black Adam (2022), the movie would be better with the JS more developed, Cavill still appears, but is more secret
Shazam: Fury of the Gods (2022)
Batman: The Red Hood (2022): A sequel that features Jason Todd returning
Aquaman and the Lost Kingdom (2023)
Justice League 3 (2023) - Darkseid's invasion
Shazam 3 (2023), Black Adam and Superman appear
TV/HBO spin-offs
Peacemaker (2022)
Nightwing (2023)
This timeline is based on one that was revealed in 2014, but tweaked