Jean Grey with the cosmic force bonded to her in the recent X-men: Dark Phoenix movie takes on the DCEU Justice League, except for Superman.
So the JL roster is: Batman, Wonder Woman, Flash, Cyborg and Aquaman (he gets his gear from the end of his own movie).
The fight takes place at the monument where the League fought Supes.
Can the Justice League take down the Dark Phoenix, or will she solo this?