Quick recap
In Zack Snyder's version Superman's death awakens the Mother Boxes, and Steppenwolf returns to Earth to win back Darkseid's favor as Darkseid hunts the Anti-Life Equation. Bruce and Diana gather Barry, Arthur and Victor, who gets a central role. With the last box they resurrect Superman, who returns in a black suit after reuniting with Lois and Martha. In the battle in Russia the Unity happens and the world ends, but the Flash enters the Speed Force, turns back time and lets Victor separate the boxes. Diana beheads Steppenwolf, and Darkseid vows to return. In the epilogue, Bruce has a vision of a dark future, Lex tells Deathstroke who Batman is, and the Martian Manhunter introduces himself to Bruce.
No spoilersOpens once you mark the title as seen.