Comic writer and journalist Evan Narcisse wrote a piece on the Icon/Superman crossover from “Worlds Collide”, an intercompany crossover event from 1994 where characters from Milestone Comics met with Superman. Part 4 of the series featured Icon (#16, August 1994)
An alien ship lands on Earth. Its occupant gets raised as human, hiding special abilities for fear of reprisal. But when the superpowered extraterrestrial becomes an adult, Truth, Justice and the American Way mean something very different. Because this strange visitor from another planet is black.