>>532402289
>the current Marvel Multiverse is NOT the first one to exist, its the 7th (technically 8th now, but that's a whole other story)
>aside from the First, each Multiverse incarnation eventually came to an end and collapsed into itself before spinging back and becoming a brand new Multiverse
>Galactus exists because he was a normal alien scientist named Galen who lived during the Multiverse that came before the current one
>his civilization figured out all of reality itself was about to end, he was part of a group of scientists/explorers/daredevil who figured ".....FUCK IT", hopped into a spaceship and flew directly into the core of the collapsing Multiverse to go out in a final blaze of glory
>Galen was the sole being who survived, got imbued with immense cosmic power from the newly reborn, well, everything, eventually reformed himself to become the World Eater
>eventually the current Multiverse will end like the others before it, and the energies of all the countless worlds Galactus has devoured will be used as fuel to kickstart the next Big Bang
>Franklin Richards was born with cosmic tier levels of power (he quite literally makes entire universes for funsies), both him and Galactus recognize that its going to be his job to take over Galactus' role in the grand cosmic order of things once reality has its big reset
Remains to be seen if that means he become an even worse version of Galactus or what have you