 In a 1988 storyline, Superman traveled to the former site of Krypton to discover that the planet was slowly reforming from the vast sphere of debris remaining.It would take millions of years before the planet would be solid again.This sphere of debris had been turned to kryptonite by the planet's destruction, and the radiation caused Superman to have a hallucination in which the entire population of Krypton came to Earth and colonized the already inhabited planet, prompting Jor-El to initiate a Terran-based resistance movement, pitting him against his estranged wife Lara and now-grown son Kal-El, at which point the hallucination ended.