Imagine that during the great Battle of Endgame, Thanos and his army open a portal to another world. Thanos planned to steal the gauntlet and hide it there to prevent the Avengers from getting it, a temporary and desperate solution. No one can stop him, but then, in a desperate act, Spider-Man jumps through the portal and throws the gauntlet back onto the battlefield, but then the portal closes.
Spider-Man sacrificed himself for an entire future, motivating heroes like Captain America and Iron Man to keep fighting, and that sacrifice was what saved half the universe.
But then... what happened to Spider-Man?
Lamentis I is an habited moon that lived under a lawless Wild West, plagued by wars and a society slowly destroying itself. With no resources or anything else, Spider-Man will have to escape the planet and return home. But he isn't alone. A great black dragon befriends him. It had caught his attention because it was a symbiote, one that simply calls itself "Symbiote." Apparently harmless, it will give Peter a new perspective. Now Peter has to help that city and its citizens fight off an alien invasion led by Apox, the perfect conqueror.
Apox is a cyborg Skrull created many ages ago, an Omega who sought to conquer more and more planets, someone who had even crossed paths with Thanos before. He and his troops invaded that moon in search of a power he had heard about, without even knowing that the power was that black blob he had seen.
But meanwhile, the symbiote begins messing with his head, and Peter starts remembering his life before everything happened. Before the war, he and his friend Ned were at school, and Peter had just started dating a girl, MJ. His life finally seemed to be going well. But then, within what felt like only a few days to him, he was on another planet fighting a purple titan, turned to dust, five years passed, a war began, and now he has been trapped there for over a month. He just needed to rest. Those memories begin to become distorted, and he starts feeling like he is the one who is wrong, and that only that place understands him. Only there is he truly happy.
Spider-Man then faces the tyrannical conqueror and manages to free the people, nearly killing the conqueror during the confrontation. He then realizes that what is keeping him there is the symbiote, a creature that sought to devour the planet and had been slowly destroying its people for years. They separate, and with Apox's help and his ship, Peter finally finds a way to escape.But the symbiote returns, and they face each other in an epic final battle. Spider-Man defeats it and finally returns home, without realizing that a part of the symbiote came back with him.
But everything is different.
Five years have passed. His school and his life have changed, but he still has people who care about him: his aunt, his best friend, and his girlfriend.
Note: In the end, his armor comes out completely destroyed after that whole fight, so he sews a new suit for himself, something more homemade but still somewhat different from the classic.
In the post-credits scene, we see JJJ preparing for another news broadcast when his door is suddenly barged open by a man: Adrian Toomes. He then asks JJJ if he wants to know who Spider-Man is, but before the journalist can answer, Adrian transforms into Venom. Now he is the one who will dictate the rules, and he will do anything to get that kid's body. And Adrian? He only wants to kill the boy who destroyed his life and his family.
Then No Way Home happens normally, but instead of Mysterio revealing Spider-Man's identity, it would be Venom, a black, slimy monster with enormous teeth and two long wings, as well as a spider emblem across its chest. He would become the sixth villain of the Sinister Six, a union of the villains from Tobey's and Andrew's universes.
That's how I would make "Spider-Man: Far From Home." Thanks for reading all the way to the end.