Fan CastingMarvel Galactus

Galactus was originally the explorer Galan of the planet Taa, which existed in the prime pre-Big Bang universe. When an unknown cosmic cataclysm gradually begins killing off all of the other life in his universe, Galan and other survivors leave Taa on a spacecraft and are engulfed in the Big Crunch. Galan, however, does not die: after bonding with the Sentience of the Universe, he changes and gestates for billions of years in an egg made of the debris of his ship that the current universe formed after the Big Bang. He emerges as Galactus, and though a Watcher observed Galactus's birth and recognizes his destructive nature, the Watcher chooses not to kill Galactus.[24][25][26] Starving for sustenance, Galactus consumes the nearby planet of Archeopia—the first of many planets he would destroy to maintain his existence.[24][27] Subsequently, in memory of his dead home world Taa, and the first planet (Archeopia) to fall prey to his hunger, Galactus constructs a new "home world": the Möbius strip-shaped space station called "Taa II".