Here's my suggestion:
Film opens with a break-in to a former S.H.I.E.L.D. weapons depot. Although we learn that some ordinance was stolen, the real problem is that the infiltrators have made copies of SHIELD and Stark Tech R&D files that include schematics for tactical gear and Avengers equipment.
We then catch up with Peter Parker, who is taking full advantage of his new outfit (see CA3:CW!) to help "look out for the little guys" in NYC. We see some kind of cool action scene that lets him really flex his powers - maybe a skyscraper window-washing team has their gear malfunction, or a cell phone tower collapses - and requires him to pay attention to saving both the victims and the on-lookers.
The press is working on overdrive to provide coverage of this new enhanced superhero, and while many are thankful that he seems to be protecting the city, there is growing concern from the independent news outlet - The Daily Bugle - that he is operating separately from the Avengers and that he could be a threat to citizen and justice department safety.
After getting home and checking in with Aunt May, who we learn is struggling as a single adoptive parent to ensure that Pete is getting what he needs academically and emotionally, we learn that Pete is also working diligently on a new IB Physics project with one of his Midtown High School peers - Charlie Weiderman. While talking about the upcoming Homecoming Prom, Pete confesses to have a crush on his classmate, Mary Jane Watson (I'd personally love to use Gwen Stacy here, but I think that Emma Stone did such a great job that the MCU will go back to using MJ) and is thinking about asking her to go with him.
Via his new webshooter tech/communicator, Pete learns of another suspected break-in this time at tech company operating in downtown. As he webs his way over to the scene, we learn via the police that the suspect is none other than our friendly neighborhood Spider-Man! Someone fitting the exact description of Spidey is spotted by the police special operations team, and we see the suspect assault a few of the police officers and then easily escape into the night. Pete is too late to arrive and assist, and realizes that he is now a wanted suspect.
This is all the Bugle needs to run a slam-piece the owner of the Bugle J. Jonah Jameson takes a personal issue with this costumed vigilante and even the police admit that maybe its time to bring Spider-Man in for questioning and detention.
Pete gets home to find Tony hanging out with Aunt May again. Hes checking in with Pete and tells him that hes here to investigate the missing SHIELD tech and to understand why Spider-Man would be involved. Pete assures him that hes not behind it, and Tony tells Pete to avoid any more appearances as Spider-Man until things get sorted out.
We learn that Petes recent grades have started to dip a bit, and after awkwardly interacting with Mary Jane at school and risking his chance to ask her to the prom, he sticks up for Charlie and gets pushed around by popular jock Flash Thompson. His physics teacher Mr. Warren assures Peter that life is full of ups and downs, and that hell never regret taking action when he knows that it is the right thing to do. Mr. Warren also tells Peter that hes looking forward to the IB project submission.
Tony reviews footage of the break-ins and is astounded to see Spider-Man committing the crimes. He receives a request from Secretary of State Ross to immediately end his investigation and that the US military and intelligence teams in conjunction with the NYC police would be bringing Spider-Man into custody. The Avengers - by dictate of the governing body authorized by the Sokovia Accords are ordered to remain out of the city and away from the situation until it is resolved. Ross reasons that it is in Tonys best interest to be away from any other fugitive enhanced. Tony immediately contacts Peter and tells him... he's on his own.
Meanwhile, from within a lab located in the outskirts of NYC, we learn that the true perpetrator is Dmitri Nikolayevich - a Russian who is stealing military information and proprietary design and then sells this information to the highest bidder. His own technology and his partnership with lab-owner and tech genius Spencer Smythe permits him to impersonate anyone, and his recent acquisition of high-tech grappling gear has enabled him to reasonably impersonate Spider-Man. Dmitri plans his ultimate prize full access to the Avengers schematics. If he is able to break into the Avengers NY tower, he can steal information about Avengers technology including Iron Mans armor, the Falcons wingsuit, Quinjet tech, etc. The price for this info is too high to resist he will break into the now unoccupied Avengers tower as Spider-Man and will steal this information.
As Pete puts more and more time into tracking down the villain who is framing him, escaping from the police who now think he's a menace, and hiding his secret life as Spider-Man from his increasingly curious Aunt May, he finds that living the hero life might not be all it's cracked up to be.
Will he be able to prove his innocence, put the Chameleon behind bars, and still make it to the prom in time? STAY TUNED, TRUE BELIEVERS...!!!
