With every new film or tv show, the Thor: Love and Thunder introduced pantheons of new gods – defined as alien or extradimensional beings in this reality – and even the incredibly powerful cosmic being, Eternity.
There are even more waiting for their time in the spotlight, which has been largely dominated by the Asgardians, Kree, and now Skrulls. Whether in Nova, the proposed X-Men project, and/or really anything else on the horizon, these aliens are ready and worthy to the MCU.
Beyonders
With Marvel returning to Avengers: Secret Wars. Although it does seem likely that Jonathan Majors' Kang the Conqueror is being set up as the saga’s main antagonist, this film could also incorporate the Beyonder and his people, the Beyonders.
They are an incredibly powerful race of extradimensional beyond and linked with the incursions that led to the Secret Wars storylines in the comics (with the Beyonder – the most recognized of his people to readers – serving as the first run’s antagonist). Given its role in both runs, perhaps Kang draws on their power to create the Battleworld, pitting the universes against one another for one final battle.
Shi'ar
Fans have been eagerly anticipating the day when the X-Men finally arrive in the MCU, and while Ms. Marvel set up their impending introduction, it might not be until near the end of the Multiverse Saga. However, whenever they are finally introduced, then the Shi’ar can follow. They are one of the most recurring and important races in the Marvel cosmos rivaling the Kree and Skrulls.
Like many other aliens, the Shi’ar are technologically and scientifically advanced and while they have interacted with all sorts of heroes and villains in the comics, they are most intrinsically linked with the X-Men. Some prominent Shi’ar includes sisters, Lilandra and Deathbird – the former a hero, and the latter, a villain.
Brood
Another significant race missing from the MCU is the Brood. They are a demonic and very dangerous race, controlled by their queen and eerily similar in design to the Xenomorph species from the Alien franchise. Their most defining characteristic is their reproduction method – they can implant their eggs into nearly anything as parasites which end up controlling their host and adopting their abilities.
They are linked with X-Men most commonly, but they’ve also fought Carol Danvers – then going by Ms. Marvel – and the Fantastic Four. Given their destructive and demonic powers, the Brood could make for scary and mysterious antagonists in a future X-Men movie, whether on their own or as part of a larger conspiracy.
Klyntar
Casual fans might better know the Klyntar as Symbiotes, with Venom being the most prominent and popular. Spider-Man: No Way Home’s post-credit scene effectively introduces them to the MCU – when Tom Hardy’s Eddie Brock left a small blob of Venom behind when he returned to his universe. However, it might not be known how their history in the comics is not solely tied to Spider-Man.
In fact, they find their origins from the Necrosword, Gorr’s sword in the mysterious and ancient god, Knull. This simply sweetened the deal for their true introduction into the MCU; however, like many things Phase Four has set up, the payout might be a ways away since there has been no official news currently about Spider-Man 4.
Cotati
Groot is having a small resurgence in popularity with the recent release of I am Groot, but fans might want to know he isn’t the only walking and talking plant from Marvel Comics. There is also the Cotati. They actually originate on Hala, the same home planet of the Kree. However, while they became a martial and imperial civilization, the Cotati remained largely peaceful, choosing rather to develop their telepathic abilities.
They were thought to be eradicated by the Kree, but the Cotati are quite resilient and clever, which allowed them to survive and actually populate worlds all over the galaxy. Interestingly, they are strangely linked with Jacques Duquesne (aka Swordsman from Hawkeye) as one of the elder Cotati is able to possess his dead body and mate with Mantis to create the Celestial Messiah. This is a storyline unlikely to ever come to the MCU, but that needn’t stop their introduction sometime down the line.
Makluan
the arrival of the villain, Fin Fang Foom, and the Makluans. They are a race of dragon-like space-faring aliens, though they can transform into other beings too.
The Ten Rings are Makluan technology in the comics. Therefore, it’s safe to say that will apply to the rings in the MCU. Most likely, it would just be Fin Fang Foom who is introduced in Shang-Chi 2 as an antagonist. At this point, nothing is really known about this film, but it could very well be one of the missing Phase Six movies to be revealed at the D23 Expo in September.
Korbinites
Although Thor has already led four solo films, there are still many iconic ing characters and allies missing from the MCU, including Beta Ray Bill. Technically, he’s been referenced as part of the universe, though he hasn’t obviously appeared in the flesh yet – his face was shown in Thor: Ragnarok as one of the former champions of Sakaar along with Ares and Bi-Beast.
Beta Ray Bill is a Korbinite and one of the few characters worthy of lifting Mjølnir, though he was later granted his own hammer, Stormbreaker. Relatively little is known about Korbinites, so when Bill finally comes into play, hopefully, more of their history and lore can be introduced too.
Phalanx
Another interesting race linked with the X-Men that could pose an interesting threat to all the heroes of the MCU is the Phalanx. Like the Brood, they also possess a hive mind, but they are actually techno-organic beings. They are able to assimilate and control nearly any other being like a transforming computer virus and with shape-shifting abilities, they are quite similar to the Skrull.
The most recognizable member of the Phalanx is Warlock, who is a renegade and opposes their conquering ways. This led to him actually ing the X-Men – being one of the few non-mutant over the years. Their introduction would naturally be contingent on the X-Men’s, and likely wouldn’t come till they’ve been significantly established, but when the option is available, it should be taken advantage of.
Arthrosians
Unlike the X-Men, fans' patience is finally coming to an end apropos to the Fantastic Four as a release date was announced at San Diego Comic-Con. rumors and theories about how and when Marvel’s First Family will be incorporated, and some point to the Negative Zone. If that’s the case that could set up Annihilus as the film’s antagonist.
He is an Arthrosian, a race of bug-like people native to the Negative Zone. They come in all sorts of forms and sizes and with Annihilus leading them, they could be difficult adversaries to the Fantastic Four. Alternatively, they could go up against other Negative Zone denizens like Blastaar, which could save Annihilus and the Arthrosians for a larger crossover-style film based on the Annihilation run and/or Nova.
Builders
So far, the Eternals, Asgardians, and likely Olympians too are some of the oldest races of aliens in the MCU – not to be confused with cosmic beings like the Celestials or Eternity. However, in the comics, the oldest race is believed to be the Builders. Comparatively, they are actually a relatively new addition to the comics, only being introduced a decade ago.
Many fans would greatly appreciate learning more about the vast history of the cosmos in the MCU. If the Builders are to the MCU, like others on this list, it likely won’t be for a long while, and it's largely contingent on the introduction of Captain Universe. Nevertheless, this is something to look forward to in the distant future.