Based on what we know about the film so far: It might be a live-action into the Spider-Verse film with Tobey Maguire and/or Andrew Garfield making an appearance, along with Alfred Molina’s Doc Ock from Spiderman 2 (2004) and Jamie Foxx’s Electro from the Amazing Spiderman 2 (2014).
Seeing how it’s also confirmed that Doctor Strange will be in the movie, he is definitely gonna be the one who most likely opens the Multiverse causing these crossovers to happen. It’s also heavily rumored that Daredevil (played by Charlie Cox) is gonna be in the movie, and it’s been confirmed that there will be a court scene.
Seeing how Spiderman was framed for Mysterio’s death at the end of Far From Home and how his identity was revealed, it’s obvious that a major plot of the film is gonna be about Peter trying to clear his name.
So with all this information in mind, we predict that the plot will be about Tom Holland’s Spiderman/Peter Parker trying to clear his name for the crime he didn’t commit, and Dr. Strange trying to help by summoning another Spiderman from another universe so people won’t think Peter is Spiderman.
And maybe something goes terribly wrong, thus summoning villains from the Tobey Maguire films and Andrew Garfield films, thus causing all 3 live-action Spiderman to team up to work together to save the day. It might also lead to the satisfying conclusion to stories that both Maguire and Garfield never really got.