And in every one, the characters are superheroes.
Is this in Greek myth? No it is not. The Greek demigods are fully human beings on a grander scale. Hercules is immensely stronger than ordinary men -- most demigods are, if not on quite a Herculean scale -- but ordinary men can be strong. Orpheus can sing animals to peace and to soften the heart of Hades, but ordinary men can sing.
Hmm - except Dionysus, who had a mortal mother.
But the demigods of modern fantasy are all superpowered, with abilities that no human can duplicate even in miniature.
Ah, the mixing of mythos.