Golden Morning was not the end of the warrior but simply a new beginning as one Izuka Midorya. The world of heros has to deal with a being that is so far from them that their entire world will be changed by his mere existence, while Scion Izuka has to deal with his new humanity and the gaping hole of emptiness.
What if Joe's rapidly evolving intellect actually changed his behavior and his relationship to humanity? What if he had specific goals and went about trying to achieve them? Flowers for Apeiron is an alternate timeline for Brockton's Celestial Forge, splitting from the original at Chapter 67, diverging by degrees until it is an entirely different story with a definite endpoint. From zero to Scion in, I don't know, thirty thousand words.