There are so many fan theories floating around online that it is easy to overlook a few gems, in particular when discussing the Marvel Cinematic Universe and their ultimate power MacGuffins -- the Infinity Stones. In the months leading up to Avengers: Infinity War and Avengers: Endgame, fan theories of all sorts spread like wildfire. Remember when people believed the Soul Stone would be in Black Panther? Or inside Heimdall?
However, a new Infinity Stone theory has emerged that may paint a portrait of the post-Endgame MCU. The theory posits that the Infinity Stones are the means through which the Eternals and X-Men came to be.
The theory was posted on Reddit's Fan Theories subreddit.
The theory focuses on a scene from Guardians of the Galaxy where The Collector explains the Infinity Stones to the Guardians. The scene depicts a Celestial (Eson the Searcher) using the Power Stone to purge an entire planet of life. We later see a group of individuals struggling to harness the raw power of the stones for a brief moment before being vaporized.
According to this theory, the Celestials used the stones on various races to see how they might affect life forms throughout the cosmos. Some of these people became the Eternals. Others might've become the first mutants.
The fan theory also states that the group of individuals attempting to harness the Power Stone in the Collector's flashback are Eternals, potentially either the Firstborn or Higher Council. They attempt to keep the stones away from the Celestials to put an end to their experiments. However, something happened to render both the Eternals and mutants (and potentially any other experimented races) dormant... until after the snap.
The Coming of the Hosts
The fan theory mentions the Coming of the Hosts, which, to more casual fans of the cosmic Marvel Universe, might sound like some random event or story they know little about. When discussing the Eternals, the Coming of the Hosts is the single most important story in their history, as it outlines their origins.
The Celestials, in the comics, came to Earth to experiment on proto-humans, turning a select few into the first Eternals. The Celestials would return, and, with each Coming, create new generations of Eternals -- or, at least, fundamentally alter their society, creating new eras in their history. They would also create the Deviants, the natural adversaries to the Eternals.
This would line up with Eson the Searcher's role in the Collector's flashback, as his coming does radically alter the society he uses the stone on. But does it make sense?
In all honesty, when discussing the Eternals, yes, for the most part. The Eternals could be, much like Carol Danvers, empowered by the stones. That would explain their phenomenal powers. It could also help explain Thanos' intense obsession with the stones, since, as a descendant of the Eternals, he would have learned about his race's history with them.
The First Mutant
This theory would potentially explain the origins of the Eternals and Deviants. We know the Celestials used the stones and we know that the Eternals are the result of Celestial experiments. This theory just combines them, but do mutants really make sense in this theory?
The first Eternals were produced from proto-humanity. The first mutant, En-Sabah Nur (Apocalypse), appeared in Ancient Egypt. Ancient Egyptians are Homo sapiens, not some proto-humanity. So, how could the Eternals and mutants come from the same core ingredients? What other mutants, aside from Apocalypse, would exist?
Perhaps, after the Infinity Stone cataclysm that rendered the Eternals inert, the Celestials attempted to experiment with mankind. After all, as proven in Guardians of the Galaxy Vol. 2, a Celestial can produce a human (Ego and Peter Quill) with incredible latent abilities. Perhaps they planted the seed that would become mutantkind.
But there are a few other issues with this theory. There is the potential for missed storytelling opportunities that are very important.
Mutants are called Children of the Atom, because, as atomic tests became prevalent, more and more mutants revealed themselves to society. But mutants do have a long history. To say the mutant gene awoke only after the snaps would rob the mutants of a colorful history.
Saying that mutants are a new thing would let them slip easily into the MCU (as no one has ever mentioned them before), but it would rob them of their secret history. If mutants only appeared after Endgame, that means no time for Professor X and Magneto to develop their relationship, no decade-spanning history for Logan, no Nathaniel Essex and his genetic experiments and, worst of all, no Storm being worshiped as a goddess.
It's not like the MCU doesn't have societies that have existed in secret for thousands of years. Unlike Wakanda and Doctor Strange's sorcerers, mutants surely couldn't have survived in secret over the last several years.
But the bigger issue is, oddly enough, with the Eternals. While their origin checks out fine, it's that idea that some calamity would have rendered them inert. Frankly, that is impossible. If this disaster rendered the Eternals inert or in some sort of stasis, that means the Eternals living on Titan wouldn't have been able to function. This means Thanos would've been frozen or stuck in some way, unless this calamity happened to let Thanos live for some reason.
The point is that this theory, while it has aspects that sound plausible, is not supported by what we've seen in the MCU thus far. It's a fascinating possibility, and some parts might be true, but on the whole? It isn't going to happen.