Interesting detail:
in the final page with Sgt Rock and JSA (what the hell gritty and realistic Sgt Rock has to do with superpowers is anybody's guess) there is no trace of Wonder Woman.
I may be entirely wrong, but I guess that the plan of making Wonder Woman the first superbeing of the DCU is no more and we are 100% back to post-Crisis, pre-New 52 status, with the JSA appearing before the JLA but without major heroes from the Trinity.