🚨Warning: MASSIVE spoilers ahead!🚨
1. First, when Peter is packing for Europe, his suitcase has the initials "B.F.P" on it — this is a nod to Uncle Ben, Peter's uncle who dies in the Spider-Man universe.
2. On Peter's passport, it says that his birthday is August 10 — Spider-Man made his Marvel comics debut in Amazing Fantasy #15 on August 10, 1962.
3. In Peter's classroom, there's a ton of Iron Man fan art hanging on the wall.
4. While Ned and Betty are sightseeing, a boat behind them reads "ASM 212," which stands for Amazing Spider-Man #212 — this is the first comic that Hydro-Man appears in.
5. Also, when Peter and MJ share their first kiss, a license plate on one of the cars reads "TASM 143," which stands for Amazing Spider-Man #143 — this is the first comic that Mary Jane and Peter kiss in.
6. And during the battle with the lava elemental, the license plate on Maria Hill's car reads "ASM 2865" — Amazing Spider-Man #28 was published in 1965 and featured the first appearance of Molten Man.
7. You can spot a pendant for New York Mets catcher Mike Piazza on Peter's bedroom wall.
8. When Peter arrives in Italy and goes to buy the Black Dahlia necklace for MJ, you can actually spot Quentin Beck in the background wearing this outfit.
9. E.D.I.T.H., the A.I. software Tony gives to Peter, is voiced by Dawn Michelle King, who was an assistant editor on several MCU movies like Iron Man and Spider-Man: Homecoming.
10. When Happy is defending Peter's friends, he attempts to throw a shield at one of the drones — this is a nod to Captain America's signature move.
11. One of Mysterio's minions is William Ginter Riva, who first appeared in Iron Man — William is played by A Christmas Story star Peter Billingsley.
12. One of the movies Peter and his classmates can watch on their flight to Europe is called Finding Wakanda.
13. One of Mysterio's illusions is a zombie-like Iron Man, which is a nod to the comic book series Marvel Zombies, which was written by The Walking Dead creator Robert Kirkman.
14. Also, the spiders that crawl all over zombie Iron Man are actually black widows.
15. When Mysterio meets Peter, he lies and says he's from Earth-833 — in the comics, Earth-833 is home to Spider-UK, a British-based Spider-Man.
16. Also, Mysterio reveals that Peter and the gang reside on Earth-616 — Earth-616 is the main universe that most of the iconic Marvel superheroes are from.
17. When Fury introduces Peter to Mysterio he says, "He's from Earth, just not yours," which is makes so much more sense after it's revealed that Fury was actually Talos in disguise.
18. Also, Fury and Maria Hill can be heard talking about a Kree sleeper cell — another small hint that they were actually Skrulls during the entire movie.
19. When Peter asks Fury why Thor can't help him, Fury alludes to the fact that Thor is hanging with the Guardians of the Galaxy — Thor leaves with the Guardians during Endgame.
20. Also, Peter asks why Captain Marvel wasn't called, which marks the first time Carol has been referred to as Captain Marvel in the movies.
21. When Peter starts building his new suit, Happy turns on AC/DC's "Back in Black" — this is the same song that played in the opening scene of Iron Man.
22. Also, when Peter is building the new suit, you can see several different suit designs that he's worn in the MCU and the comic books.
23. When Happy visits Aunt May and Peter at the fundraiser, he stands in front of a Crusher Hogan poster — Hogan appeared opposite Spider-Man in the comic books.
24. Another one of Mysterio's illusions features MJ getting thrown off a bridge — this is a nod Gwen Stacy's death in the The Amazing Spider-Man #121–122.
25. The beach Fury is vacationing on during the post-credits scene resembles Tahiti, which is where Coulson and May go during Agents of S.H.I.E.L.D.
26. When Peter picks up the Tower Bridge sign and the drone while fighting, it's reminiscent of when Captain America used his shield and Mjölnir in Endgame.
27. When Spider-Man swings past Grand Central, you can spot the Battle of New York memorial statue.
28. Also, Spider-Man takes a selfie, which is a nod to the Spider-Man PS4 photo mode.
29. And finally, Spider-Man also swings by a sign that reads "we are so excited to show you what comes next" — this is a tease for the future of the Marvel Cinematic Universe.
