With the Multiverse Saga nearing it's end with Avengers: Doomsday and Secret Wars, the next saga is already close. With Disney's acquisition of Fox and it's rights to Marvel characters like the X-Men, it is likely the next Saga will focus on the mutants. It could be named The Mutant Saga, but if the Phoenix Force comes into play The Phoenix Saga would be an apt title as well. However, the world of the MCU is also still occupied by the Avengers and other superheroes. So, here's a look at what the trilogies, titles and release dates could look like.
Spider-Man: The City That Never Sleeps
The next Spider-Man movie, Spectacular Spider-Man (2026), could follow a street-level Spider-Man fighting Kingpin (and Scorpion as his muscle) with the help of Daredevil. With MJ and Ned off to college, this is a good opportunity to introduce new friends: Harry Osborn for Peter Parker, and Black Cat as foil for Spider-Man. Then, Sensational Spider-Man (2028) follows Spider-Man as he bonds with the piece of Venom and faces off against the likes of Kraven, Agent Venom, Mr. Negative and eventually Knull. Miles Morales also enters the story, and ends up gaining powers too...
The trilogy comes together in Ultimate Spider-Man (2030). As Peter is teaches Miles his newfound powers, Octavius turns mad by his new science project. To fight the Spider-Men, Ock recruits Vulture, Scorpion, Mysterio, Shocker and Hobgoblin (Ned Leeds corrupted by Ock) into his Sinister Six. Outside of this, Spider-Man will mostl likely appearing in both Avengers movies. Secret Wars could even see him unite with the other live-action Spider-Man to form the Spider-Corps, based on the Thor Corps of the comics. Eventually, Spider-Man could even join up with the Future Foundation.
X-Men: The Mutant Saga
The saga could kick off with Uncanny X-Men (2028). It follows the first team of the comics (Cyclops, Beast, Marvel Girl, Angel and Iceman) as they and Genosha are revealed to the world by Mr. Sinister. Sinister plans to use Cyclops and Marvel Girl to prepare for a future threat, but is foiled by the X-Men. With mutants now out in the open, the X-Men are attacked and abducted by Sentinels in Giant-Size X-Men (2031). Only Cyclops remains, who recruits, Wolverine (introduced in his own tv show), Banshee, Storm, Sunfire, Colussus, Nightcrawler and Thunderbird to defeat the Sentinels and free the abducted mutants.
The threat Sinister has warned off has arrived finally arrived in Astonishing X-Men (2034): Apocalypse. Both the Blue and Gold teams work together with the time-travelling Cable to defeat him. However, they learn the pregnant Jean wasn't Jean at all, but a clone replaced by Sinister before he was defeated. A companion tv show could expand on the school's students like X-23, Shadowcat, Psylocke, Dazzler, Gambit, Jubilee, Bishop, Magik and Rogue and villains like Magneto's Brotherhood, The Hellfire Club and The Brood, while a Starjammers focuses on threats from space like the Shi'Ar.
Avengers: World's Mightiest Heroes
The next Saga could feature different teams. First off would be Avengers: Annihilation (2030). Annihilus, the threat first set up in Nova (2027) arrives with his Annihilation Wave. To oppose them, Nova forms a united front consisting of Captain Marvel, Thor, Rocket's Guardians of the Galaxy and the remaining Eternals. Some time after, West Coast Avengers (2033) could expand the Avengers' influence with a West Coast-based. This team is led by a retired Hawkeye and sees Shang-Chi, Wonder Man, She-Hulk and others face a Power Cosmic-imbued Korvac.
Finally, the Saga comes to a close with Avengers vs. X-Men Part 1 (2036) and Avengers vs. X-Men Part 2 (2037). When the Phoenix Force arrives to merge with Hope, Cable and the X-Men attack the Avengers to protect her from them. Part 1 ends with the Force being split in five parts and merging with different X-Men, including Cyclops. In the year in-between, the Phoenix Five have been reforming the world. In Part 2, the Avengers and X-Men once again come to blows as the Phoenix Five's power grows unchecked. The conflict ends when Hope finally absorbs the Force.
Finally, there's also Avengers Academy with Hawkeye, Ms. Marvel, Ironheart, America Chavez, Stature, Wiccan and Speed fighting the Masters of Evil and Midnight Sons with Doctor Strange, Black Knight, Blade, Moon Knight, Werewolf, Man-Thing and Elsa fighting Lilith. Phase 7 will also see Doctor Strange in the Dimension of Darkness (2028), Black Panther 3 (2029), Shang-Chi and the Legend of the Immortal Weapons (2030), and Captain Marvel & Thor (2029) with Captain Marvel and Thor take on Norman and his Dark Avengers, including Hercules, in a fight for New Asgard.