As the Superman's Younger Brother, I Became Homelander

Wonder Woman: "Why are you the younger brother of Superman?"

Eric replies: "On the first day of transmigration, I crawled into Superman's infant space pod as a baby, pushed him out, took over his place, and thus became a 'Child of Krypton.'"

Superman: "Why didn't you go save the plane?"

Eric replies: "I can't step on air to lift things."

Batman: "Why didn't Kryptonite work on you this time?"

Eric answers: "I originally wanted to interact with you as a Kryptonian, but I was met with alienation instead. Alright, I won't pretend anymore. I'll be honest—I Homelander."

...

This is a story about a character who is Homelander, mistaken for a Kryptonian, but in reality, is a sinister and scheming figure causing trouble in the superhero world.