Justice League: 10 New Scenes Zack Snyder's Upcoming Reshoots Could Add
1. A Flashpoint Post-Credits Teaser
In The Flash movie that's coming out in 2022, Ezra Miller's Scarlet Speedster will travel through the DC Multiverse, visiting different world and timelines in an adventure that promises to be unlike anything fans have seen before.
"The Snyder Cut" of Justice League will presumably be considered canon after it's released on HBO Max, with Joss Whedon's version forgotten about. Warner Bros. would be wise to use this Director's Cut to help set the stage for what comes next for Barry Allen, and a post-credits scene could easily lay the groundwork for the Fastest Man Alive's return.
Bear in mind that Ben Affleck has signed up to return as Batman in The Flash, so some sort of interaction between the two which teases what comes next for them makes perfect sense (especially if there's no longer a need for that stinger which was meant to hype up The Batman).
"Knightmare" and the "SnyderVerse" could end up being wiped away by the creation of a new Earth in The Flash, so tying the two stories together is an idea with a tonne of potential...and a nice way to bid farewell to this era of the DC Extended Universe.