A villain could be a corrupted version of a well - known Spider - Person. Maybe in one universe, a Spider - Person succumbs to the power they have and becomes a power - hungry tyrant who wants to control all the other Spider - Verses. They use their knowledge of the multiverse and their powers to create chaos and try to take over.
One idea could be exploring a different Spider - Person's origin story within the multiverse. For example, a Spider - Person from a world where spiders are sentient and work together with the human Spider - Person. Another could be a story where all the Spider - People have to team up against a villain who can manipulate time across the multiverse, causing chaos and disrupting the fabric of each Spider - Verse.
In many aspects, 'Across the Spider-Verse' adheres to the comic book canon. However, there might be some creative liberties taken to make the story more cinematic and engaging for the audience while still respecting the core elements of the comics.
It's a story about Miles Morales. He's a Spider - Man from his own universe. In this movie, he travels across different spider - verses. He meets various versions of Spider - Man and Spider - Woman. There are cool action scenes and a lot of character development as he tries to find his place among all these different spider - powered heroes.