For viewers seeking a thematic "Part 2" that addresses the consequences of altering time, Justice League Dark: Apokolips War (2020) serves as the grand finale of that entire 16-movie arc. It brings the story full circle back to the events of Flashpoint .

The Justice League tries to contain the Amazonian invaders. Bruce Wayne meets Thomas Wayne. It’s a brutal, emotional confrontation—Bruce sees the monster he could have become, and Thomas is horrified that his sacrifice didn't "save" his son from the cowl. The Villain: The real threat emerges: Reverse-Flash (Eobard Thawne)

The first meeting of the Justice League in the rebooted universe as they defend Earth against Darkseid. Continuity:

In a gut-wrenching reversal of the first film, Barry doesn’t save her. He gently places a hand on Thawne’s chest and vibrates his molecules through the Reverse-Flash’s heart—not killing him, but unwriting him from every timeline. As Thawne screams into non-existence, Barry turns to his mother.