Over the years, Warner Bros. has been trying to revitalize the DCEU. Studio executives realized the darker Snyderverse wouldn't garner the fan, critical and ubiquitous box office reception that the MCU had in its prime. Even with warmer, sentimental movies like the Shazam! and Wonder Woman films, it felt like audiences weren't into the DC product as much. Despite 2018's Aquaman cracking over $1 billion worldwide, Warner Bros. was steadily losing momentum in the market.
Source：https://www.cbr.com/aquaman-2-james-gunn-dcu-zack-snyder-dceu-end/
