A Hero's Multiverse AHM

What happens to a tragic hero, after he loses everything...

Ethan Wayne, the biological son of Clark Kent aka Superman and Diana Prince aka Wonder Woman, grew up under the care of his uncle Bruce Wayne aka Batman, following the death of his parents on the day known as the 'Doom of Heroes'.

As one day out of nowhere his timeline gets suddenly erased and he ends up on the border between the DC and Marvel universes, the Multiverse opens up to him...

Will he become the greatest hero of both the DC and Marvel Universe?
Can he charm the most powerful heroines into becoming his?
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Disclaimer: I do not own the rights to either DC or Marvel or other third party properties...