I went to see this in an actual physical theater with Pun Son. I had a great time.
Do I really need to provide a plot summary? Given that anyone interested has probably already seen it? And everyone else doesn't care? Well, I always do, so here 'tis;
At the close of the previous movie, the dying revenge of the villainous Mysterio was to provide J. Jonah Jameson (shown here as an Alex Jones-style babbler) with Spider-Man's secret identity, Peter Parker. A cliff-hanger indeed!
This (of course) proves problematic for Peter. (Tony Stark, being a gazillionaire, could get away with revealing his Iron Man identity; Peter doesn't have the finances to bring it off.) It's also tough on his pals, MJ and Ned. Specifically, all three fail to get into MIT, due to the controversy.
Like anyone wants to go to MIT. Shoulda tried Caltech.
Peter turns to his acquaintance from the Avengers movies, Doctor Strange. After some (pretty funny) back-and-forth, the Doc weaves a worldwide mass-amnesia spell. Which, thanks to Peter's meddling, goes very badly, opening up portals to alternate timelines. Which (in turn) summons all sorts of bad guys from those timelines. And if you're at all familiar with the Spiderverse, and look at the DVD box over there on the right (or if you've seen the trailer), you know one of them already.
Fortunately, it's not just the bad guys that show up. But not in time to save our hero from a certain amount of heartbreak.