The barrage of casting updates for James Gunn's upcoming Superman: Legacy hints at a powerful new superhero team being included in the future of the DCU. Since the casting of David Corenswet and Rachel Brosnahan in the film's dual protagonist roles of Superman and Lois Lane respectively, Superman: Legacy's casting has gone into overdrive. Part of this comes from a report by The Hollywood Reporter, in which it was stated that Corenswet's Superman would be joining a world in which plenty of superheroes already exist, rather than Clark Kent's Kryptonian alter ego kickstarting the wave of DCU metahumans.
https://screenrant.com/superman-legacy-casting-makes-terrifics-more-likely/