I found this concept very intriguing. Many historical findings yield to the theory that Hades is a god that only began to exist during the Greek dark ages, who is absent in the majority of the stories in the mythology, and the idea of the "King of the Underworld" in Greece was not found in the Mycenaean texts (Linear B) and older records. I am having a new take on the myths: instead of the traditional version of Zeus, Poseidon, and Hades being siblings from the same parents, Hades is actually a creation of Zeus himself from the darkness of his own shadow. Since Hades was often called the Chthonic Zeus / Zeus Khthonios, what if we take this concept to an even wilder approach by making Hades a shadow clone of Zeus? This would have explained why Hades was not among the 12 Olympians despite his status, and there are fewer stories about him the further we go back in time.
In this alternate timeline, the only brother Zeus has is Poseidon. However, during the dark ages in Greece, because of the instabilities and increasing deaths in the world, the growing negativities that flow into the underworld started to threaten the order of the universe. Therefore, with his all-knowing wisdom, Zeus decides to project his own shadow deep into the underworld, infused with a portion of the powers that separated from him, to restore the balance of the universe. Down below, a new entity emerged from this darkness: Hades. He is the embodiment of what Zeus represses—death, stillness, and inevitability. The two also contrasts each other like an inverted mirror: Zeus, the loud, thunderous, emotional, dominant sky god who radiates light, giving rise to the silent, stern, grim, inescapable underworld god Hades that absorbs it. What is everyone's opinion on this idea so far?