Superman: Legacy, the DC Universe's first movie, might already be replacing the Justice League. Superman: Legacy promises to start the new DC Universe, which is spearheaded by DC Studios co-CEOs James Gunn and Peter Safran, with a bang. Gunn is not only DC's new creative chief, but he is also the writer and director of Superman: Legacy, closely guiding the beginning of the new DC Universe. Superman: Legacy stars David Corenswet as Superman and Rachel Brosnahan as Lois Lane. The duo was revealed after a long casting process that had Gunn and the DC team look over hundreds of possible actors for both roles.
https://screenrant.com/superman-legacy-justice-league-replacement/