One of the members of the Monster Society of Evil is totally Black Adam, a villain we’ve been promised in the DC Universe for what seems like forever, as the role has been cast with Dwayne Johnson set to play it.
If that’s the case, we might get to see one of two things happen: Dwayne Johnson gets his Black Adam solo flick, in order to spice thing up and set up the Monster Society of Evil further for its eventual return in Shazam!
2, or he starts off as a supporting character of that very sequel, and gets to branch off into taking Superman on for sport after the fact.
While the DC Comics film canon has been undergoing some changes, both in which films are headed down the pike, and the cast members who will be participating in the future, it’s a safe bet that Johnson isn’t going anywhere anytime soon, (he was actually one of the producers of Shazam!, so he’s clearly invested in this franchise).