Marvel Studios has been busy developing their own Multiverse Saga with Kang the Conqueror at its core, but it seems that DC had their own multiversal plans beyond just The Flash‘s upcoming release. While Walter Hamada is no longer involved with DC or Warner Bros, it seems his original plan was to develop a Crisis on Infinite Earths film but have Henry Cavill‘s Superman slowly build up that storyline through breadcrumbs in various movies.
It seems likely that The Flash was going to unleash the multiveerse unto the DC Extended Universe with Ben Affleck and Michael Keaton‘s versions of Batman’s existing simultaneously. Ironically, it seems that Dwayne Johnson‘s own plans to make Black Adam a Superman rival and forcefully bringing Cavill back in the role may have also derailed those plans somewhat. Though, it’s uncertain just how far they mapped out the concept and if they were trying to test the waters.
The idea to not give Superman a sequel but rather use him for cameos is curious–pretty much the Nick Fury for the DCEU. It may have also been a decision based around Cavill‘s booked schedule with The Witcher (ironic given recent developments) and the Enola Holmes movies. Once a Warhammer 40K or World of Warcraft project picks up any steam, he’ll likely throw his hat into the ring for those as well. So, even if he won’t truly return as Superman, there are many franchises that’ll definitely catch his attention.
Source: The Hollywood Reporter