When a new Dc Comics villain appears and ... This confirms that the Aftermath are in fact the remnants of Calaton, joined with the descendants of Doomsday's ancient reign of destruction.
While a confrontation with Radiant isn't something anyone wants, the fact Radiant and Superman disagree on Doomsday's fate is likely going to lead them to blows. In other words, before DC Comics ...
Director Joe Russo says that the comics are serving as "loose inspiration" for Avengers: Doomsday and Avengers: Secret Wars.
This might be the kind of unofficial and unauthorised Watchmen sequel that DC publishes which Alan Moore wouldn't particularly mind. After all, he does like some mindless punnery no matter where ...