The DC Universe is preparing for a new era of content on TV and film, and kicking it off is Superman: Legacy – and here are the biggest details that James Gunn has confirmed and debunked about this project. The success of the Marvel Cinematic Universe was key for the development of more connected universes, most notably the DC Extended Universe, which began in 2013 with Man of Steel. Although the DCEU brought characters like Batman, Aquaman, Shazam, Flash, and Harley Quinn to life, it wasn’t the success that the studio was hoping for, so major changes were made.
https://screenrant.com/superman-legacy-movie-james-gunn-details-confirmed-debunked/