In 2018, the Marvel Cinematic Universe's Infinity Saga finally reached the beginning of its grand finale, with the release of Avengers: Infinity War. The MCU had been building a huge overarching story known as the Infinity Saga using a mix of movies and TV shows since it began in 2008 and brought together tons of heroes and villains in time for its grand cosmic event - the Infinity War.
Comic fans will be familiar with the Infinity War storyline from the comic books on which the movie's cosmic event was based, and the Marvel community is speculating what the MCU's next big super-powered cosmic event could be. Just like Infinity War's comic inspiration, there are so many exciting huge different cosmic events and multiversal threats from the comics that the MCU could adapt next, assembling heroes old and new.
The Contest Of Champions
Marvel's very first limited series occurred in The Contest Of Champions, where the Grandmaster challenges Death to a game which, if he wins, his fellow Elder, The Collector, is revived.
Both the Grandmaster and Death transported a chosen team of heroes from Earth and forced them into the contest against each other, which would be an interesting thing to see in the MCU, where heroes are divided and forced to compete. Furthermore, this short series introduced lots of new international Marvel heroes such as Shamrock, Talisman, and Defensor, so the event could introduce more diversity into the MCU with multiple new international characters.
Marvel Zombies
Teased in What If...?, Marvel Zombies spans multiple comic series and features a whole universe of zombified Marvel heroes and villains - which start to leak into other universes, in desperate attempts to consume.
What If...? already introduced some strong zombies into the MCU, which are going to be expanded upon in the Marvel Zombies TV show, so there is a good chance that they could become more significant in the MCU's future and face off against the universe's heroes. This galactic threat could also introduce Elsa Bloodstone into the MCU, Marvel's resident monster-hunter, which would be a treat for long-time Marvel comic fans, and would set up some fantastic horror-filled MCU stories.
King In Black
One of Marvel's more recent events, The King In Black, introduced us to Knull, the original creator of the symbiotes, and one of the deadliest threats the universe has ever seen.
Before attacking Earth, Knull decimated multiple planets using his huge army of symbiote dragons, and his weapon, the Necrosword, which he forged from the first-ever symbiote, All-Black. Interestingly, Eddie Brock is the main protagonist of this cosmic event, so the MCU could bring back Tom Hardy's Venom in a very exciting way, working alongside MCU heroes like Doctor Strange and Spider-Man. It would be incredible to see the symbiote dragons come to life on the big screen, and it would be interesting to see different Marvel heroes getting possessed by symbiotes.
War Of The Realms
In War of the Realms, Maleketh the Accused attacks Midgard (Earth) and attempts to conquer it in his quest to control all nine realms. In this cosmic comic event, Midgard is the last realm Maleketh needs to conquer.
Most MCU fans agree that Thor: Ragnarok, so it would be a perfect adaptation for the MCU.
Kree-Skrull War
Marvel comics' biggest-scaled war was the long-lasting Kree-Skrull War, which was teased throughout Captain Marvel, and serves as one of Marvel comics' most defining stories.
Although the original Kree-Skrull War was released between 1971 and 1972, the war has technically only recently finished, with 2019's Incoming! one-shot, which united the two races together under Hulkling's rule. The war has lasted almost 50 years in real-time and boasts a huge range of intergalactic battles and characters that cannot be confined to just one movie - as Captain Marvel misses way too much out. The MCU deserves multiple movies to cover this epic galactic conflict, as there is so much more to it than we haven't even seen a glimpse of yet.
Secret Wars (1984)
Marvel's very first crossover event, Secret Wars, first happened in 1984, and introduced fans to Battleworld, a distant planet that many Marvel heroes and villains are transported to.
The characters had been brought to Battleworld by an entity known as the Beyonder, who had been studying the main Marvel universe and wanted to see who would win in a fight against good and evil. This would be incredible to see in the MCU, as it could bring back multiple heroes and villains, in one huge exciting movie where fan-favorite characters are forced to battle against each other to survive. Fans of the comics will also know that this is where Spider-Man first got his black suit, so another huge surprise could be revealed in a potential Secret Wars event in the MCU.
Korvac Saga
One of Marvel's most brutal cosmic stories is the Korvac Saga, where Micheal Korvac, a cyborg from the future, travels through time to try and escape the pursuing Guardians Of The Galaxy.
Throughout the event, Korvac gains god-like abilities using the Power Cosmic, which allows him to gain a human form and go to Earth. When the Avengers eventually find him, a huge fight breaks out - where Korvac eliminates almost every member of the Avengers and Guardians Of The Galaxy before being beaten by Thor. Tragically, Korvac revives all the fallen heroes before perishing himself, and his lover Carina reveals he wasn't evil. This would be an incredible event to witness in the MCU, full of dramatic plot twists, heartbreaking moments, intergalactic powers, and more for fans to experience.
Galactus' Arrival
Throughout Marvel's history, Galactus has been a constant cosmic threat to Earth and the universe as a whole, and fans are eagerly awaiting his entrance into the MCU.
Galactus is one of the most powerful villains in the Marvel Universe, so it comes as no surprise that the MCU community desperately wants to see him on the big screen. Galactus' arrival would also introduce the fan-favorite Silver Surfer into the MCU, who would warn Earth's heroes of the fast-approaching threat - the Devourer Of Worlds. It would truly be a spectacle to see, as Galactus is not only bigger than a planet but also more powerful than all the Infinity Stones - so he would be an even bigger threat than Thanos.
Annihilation
The terrifying insect-based villain, Annihilus, has just one goal - to eliminate all life in the universe.
In the comic event, Annihilus enters the Universe from the Negative Zone, bringing with him the Annihilation Wave - a huge armada that slowly moves across the universe, expanding Annihilus' rule and destroying everything in its path. The event is largely cosmic-based and would be an incredible spectacle on the big screen in the MCU, bringing together the MCU's cosmic heroes in an intense struggle to save the universe, and hugely expanding the universe beyond what we've seen so far.
Secret Wars (2015)
Marvel's biggest cosmic event yet was the return of Secret Wars in 2015, which featured the ultimate destruction of the Multiverse and the creation of a brand-new Battleworld ruled by God Emperor Doom.
With the MCU becoming more Multiverse-based, Secret Wars could come sooner rather than later, and would be a perfect way to tie together all the separate Marvel Universes we have seen so far - such as the MCU, Fox's X-Men Universe, the What If...? Universes, and more. This event would be incredible to see on the big screen, bringing together every Marvel character, event, location, gadget, and more into one incredible cinematic Marvel story, topping every MCU crossover we've seen so far.
