James Gunn's DC Universe is recasting Superman for Superman: Legacy, and here is when the casting announcement could be made. Superman's role in the DC Universe has been a focal point of James Gunn's plans from the moment that he and Peter Safran took over DC Studios. This included making headlines early on by confirming that Henry Cavill is out as the Man of Steel. It was confirmed that the DC Universe would recast Superman ahead of his lead role in Superman: Legacy, a non-origin story movie exploring Clark Kent/Kal-El's parents written and directed by Gunn.
https://screenrant.com/when-dc-superman-recast-announcement-james-gunn/