All info has been provided by Comic Book Resources, ComicBook.com & ComicBookMovie.com
The following information where all released at the Marvel Studio Panel at the SDCC
To begin we have the official synopsis for Spider-Man: Homecoming
A young Peter Parker/Spider-Man (Tom Holland), who made his sensational debut in Marvel Studios’ Captain America: Civil War, begins to navigate his newfound identity as the web-slinging superhero in Spider-Man: Homecoming.
While admittedly short on detail, we can say that, one, it does take place after Captain America: Civil War, of course, and two, due to that event his profile as Spider-Man has been elevated and the movie will deal with his increased profile.
We also have confirmation on some of the characters and who is playing them
Zendaya Coleman is Michelle
(presumably a new take on Michele Gonzales, Peter Parker’s one-time roommate in the main book)
Tony Revolori is Flash Thompson
Jacob Batalon is Ned Leeds
Laura Harrier is Liz Allen.
Now I could do my take on them, but to be honest I have no idea who these people are, so it wouldn’t be fair to comment.
But before everything above was revealed, people who were lucky enough to attend, unfortunately I wasn’t, were given the opportunity to see the very first piece of footage of Spider-Man: Homecoming.
and for my thoughts on it from what I heard, all I can is I wish I was there to see it in person, because it sounded awesome, exactly how Spider-Man should be, and not the stuff they try to feed us in the main comic. That’s why I am expecting big things from the movie.
Which according to multiple sources the footage went like this
It opened up to song “Bad Reputation” playing over a batch of yearbook photos, after which it switches over to a typical day at Midtown High for Peter Parker.
We then see Peter Parker in class checking out his fight against Giant-Man on Youtube. During which, the teacher asks the class a difficult question, which Flash Thompson (Tony Revolori) answers incorrectly. Then the teacher asks the same of Peter, who while he was not paying attention, due to him watching his fight, easily gives the right answer, which attracts animosity from Flash Thompson.
Next, Peter and his friend, Ned Leeds (Jacob Batalon), are taking part in a typical high school activity, that being, checking out girls as they walk by them in the hall. Peter then says “We have to stop this before it gets creepy,” but not before Michelle (Zendaya Coleman) catches them and says “Too late“. Next we see Peter in the chemistry lab where he is secretly hard-at-work on his web fluid formula instead of his school work.
We then switch to a study group scene where Peter gets a text and has to leave quickly. and as he’s leaving, Michelle asks “Where are you always disappearing to, Parker?” which flusters Peter, forcing him to try to come up with something believable, but luckily Michelle immediately follows-up with a brutal “Just kidding, I don’t care what you do.” After which we see montage of Spidey in action – climbing walls, fighting bad guys, running on vehicles – ending with the final reveal which of course is the film’s villain, The Vulture, who is seen zooming down a tube in his battle-ready armour.
And to go even further, Marvel has also released a piece concept art depicting an aerial fight between Spider-Man and The Vulture