One of the weakest Spider-Man movies
I just watched this so forgive me if this stuff has been addressed deep in the threads before.
There's a lot to like in this movie, but on balance, I thought it was the one of the weaker of all the Spider-man movies.
I couldn't overlook so many inconsistent plot elements, plot holes, and sloppy writing.
i. Somewhat implausible. Mysterio's post-mortem announcement of Spider-man's identity is just accepted at face value by the world. I think most people would be thinking: "Who is Peter Parker? Then: No way is the powerful Spider-man this nerdy no name high school kid. This is just some guy's deepfake video." (Or something similar.)
ii. Really, really implausible: Dr. Strange is ready to risk the very fabric of space and time to help the world forget that Spider-man is Peter Parker. Peter has the resources of Stark Industries through Happy available to him. It would be much easier and safer to organize a disinformation campaign to make people believe that Mysterio's and Jamison's announcement were fake news. (See my suggestion above as an example.) Hell, just build a robotic Spider-man -- similar to the Iron Man drones -- to make an appearances alongside Parker to raise big doubts.
iii. Sloppy writing. I can accept some sort of magic glitch opens up the multiverse and allows all the former villains and alternate Spider-guys to travel to our universe. But, they all just sort of shrug, or barely raise an eyebrow at this previously unknown phenomenom and accept it at face value. No expressions of sheer amazement. It takes mere seconds, maybe a minute to get over the shock.
The two other Spider-man arrive, apparently already aware that they have slipped into an alternate reality. They too have no unusual reaction to this miraculous event. They have no big concerns about whether they can even return to their own universes.
iv. Plot hole: All these villains are snatched from their respective universes at the instant before they die. But within their respective universes, they all died at separate times. So they also traveled through time? Doc Ock should have known quickly that he wasn't in his own universe/time based on the tech he encounters in the Spider suit. Instead he doesn't even appear to know it happened at all. The vastly different New York skyline should have been a big indicator to him that he wasn't in his own world.
(Sidebar: Also, iirc Sandman didn't die, he just lost his powers.)
v. The plan is to remove all their superpowers so that when they return to their time, they won't die. There would be no need for Spider-men to do battle with them. Again though they would all have to travel to the correct time as well within their respective universes.
But when the respective Spider-men return, which time do they return to? For example, if Tobey Spider-man returns to the time that he was battling Doc Ock, he will have already killed Green Goblin a few years before that.
vi. HUGE plot holes / plot flaws:
The world forgets Peter Parker. Completely. How DOES THAT work? Is it like a re-jigged timeline where Peter Parker never existed at all? It can't be that because that re-writes huge swaths of the MCU since Civil War.
Is it a form of global amnesia? Everybody remembers everything that happened, except anything involving Peter Parker is scrubbed from memory.
That's even more awkward as a workable plot device. The entire world -- or most of it -- would be suffering this collective amnesia that would rival the Thanos snap in its scope and implications. Do people just have these huge gaps in their memories? Are they fine with these missing blocks of memories?
For example:
When Happy shows up at May's grave alongside Peter. How would he have met May at all since he met her through Peter? He must be wondering: Why she was even at the Statue of Liberty at all on the day of the battle?
MJ still has the scar from the battle at The Statue of Liberty. In her mind, how did she get there alongside Spider-men without any interaction with Peter Parker which was integral to her being there in the first place?
All those previous movies in which Peter Parker interacted with other MCU superheros. They would all suddenly have to grapple with these unexplained gaps in memory.
Also, all records of Peter Parker would also have to disappear. Otherwise, the actual video of him being outed as Spider-man by Mysterio still exists and renders Strange's spell meaningless.
But, if all records of him disappear, THAT introduces a HUGE number of complications that I couldn't even begin to start listing here.
Long post I know. Thanks for reading this far.