Book 3 is on Earth-16, and it’s “The Just.” In this world, “Batman and Superman have already solved all the problems of Earth,” and their kids are now left on the world, with superpowers, but there is “seriously nothing to do. Green Arrow (Connor Hawke)’s daughter Arrowette is a Miley Cyrus type and he’s trying to stop her getting involved in this stuff. It’s a fun book.”
In this world, too, The Atom turns 18 and never grows up from there. Lex Luthor’s daughter is having an affair with Batman, Jr. - who is Damian Wayne grown up. And in this world Lex killed Superman, so Superman, Jr. (Chris Kent) is really pissed about their relationship. Offspring, Plasticman’s son from an old Mark Waid/Frank Quitely story is in it, too.