Shazam was originally the biggest outlier in DC’s movie plans, and only seemed to exist due to the involvement of Dwayne “The Rock” Johnson as Black Adam.
Another big question about Black Adam is whether he’s a hero or a villain.
Yes, of course, in the mythology Black Adam is a villain.
Beyond that, there are still plans for Suicide Squad 2, Gotham City Sirens, Cyborg, Justice League 2, and Green Lantern Corps, but none of them have made much movement.