Though he first appeared in 1965’s Fantastic Four #48 and is thought of as a “Fantastic Four villain”, Galactus actually has quite the history with another major Marvel character. The Devourer of Worlds has quite the origin story, being the only being to survive the transition from the Sixth Cosmos to the Seventh Cosmos, and one day on a planetoid in the depths of space, Galactus chose to tell that story to Thor. As is often the case in Marvel Comics, Galactus’ origin story has been retconned over time, but he first told it to Thor in 1969 over issues #168 and #169, forging a pretty solid bond between the two characters. That bond was recently severed when Thor killed Galactus, but what’s a little killing between friends?
Fans have yet to see a live-action version of Galactus hit the screen (that thing in Fantastic Four: Rise of the Silver Surfer will never be recognized as Galactus) but it turns out that he almost made his MCU debut alongside his buddy Thor in Thor: Love and Thunder. Unused concept art from Anthony Winn reveals that the idea was at least kicked around at one point in time. The concept art shows Galactus facing off in space against Jane Foster’s Mighty Thor!
The story behind why Galactus didn’t make the cut may never become public knowledge, but it’s fascinating to see just how close fans of the character were to his extremely long-awaited debut. It’s unknown at present just what Marvel Studios’ plans are for the character. He may appear in the rumored Silver Surfer Special Presentation. He may appear in Fantastic Four. The powers that be may choose to take a page from his comic book origin and wait until the creation of the next iteration of the Cosmos, perhaps following Avengers: Secret Wars, before adding him to the mix. Whatever the case, it seems highly probable it will be a comic-accurate Galactus whenever he shows up and not a lingering fart cloud traversing through space.
Source: Anthony Winn