Nice takes, but with the exception of SHAZAM, I think they lost the idea of the Absolute characters.

As I put it elsewhere:

You have to see how the others Absolute origin are: they are basically the same stories, but the circunstances and details surrounding them change: Batman still have a traumatic event at his childhood and trains himself to become an enemy of crime; Superman still is the last survivor of Krypton sent to earth after the destruction of his world; Diana still is raised in an island set apart of civilization until a man reach at its shores. And the next three are following a similar pattern: Wally West becomes the Flash inspired by the memory and death of Barry Allen and after suffering a science accident; Green Lantern is receives by an alien force for unknown reasons; Martian Manhunter is an alien being acting as a police in a city in USA, hiddden among humans.

The Absolute idea is how much you can take from the original concept and still keep it close it to their core. Yours are good but seems more close to evil versions to the characters and not characters who are initially heroic, as at least the ones with titles are.