13.Bucky asks John if he's ever jumped on a grenade in TheFalcon and the Winter Soldier because that's the test Colonel Phillips used in First Avenger to see if Steve had "guts."
14.Principal Morita in Spider-Man: Homecoming has a picture of his grandfather, Jim Morita, one of Cap's Howling Commandos from Captain America: The First Avenger (and both characters are played by Kenneth Choi).
15.In the Captain America exhibit in The Falcon and the Winter Soldier, there's a wall of documents, many of which appeared in Captain America: The First Avenger.
16.In the fight club in Shang-Chi, we see a widow from Black Widow, an Extremis soldier from Iron Man 3, Abomination from The Incredible Hulk, and obviously, Wong from Doctor Strange.
17.In Spider-Man: Far From Home, Peter unknowingly mimics the way Tony interacts with holograms in Iron Man, which gets him a fond look from Happy.
18.WandaVision reveals that Jimmy Woo mastered the card trick he asked Scott about in Ant-Man and the Wasp.
19.Loki cheering when Hulk smashes Thor in Thor: Ragnarok is a reference to Loki getting similarly smashed in The Avengers.
20.A map in a S.H.I.E.L.D. facility in Iron Man 2 seems to label significant places in both past and future MCU movies.
21.Thor's comment after Steve calls Mjolnir in Endgame confirms that he saw Steve was worthy enough to lift the hammer in Age of Ultron.
22.In Agent Carter, we meet the Stark Labs scientist Anton Vanko, who we learned in Iron Man 2 helped create Stark's arc reactor technology and also fathered Ivan Vanko, aka Whiplash.
23.In The Incredible Hulk, we meet a pizza-craving grad student who grows up to become Peter Parker's teacher in Spider-Man: Homecoming.
24.In Spider-Man: Homecoming, there's a picture of Bruce Banner in Peter's physics class and a mural of Howard Stark in a stairwell.
25.Thor's failed attempt to soothe Hulk in Thor: Ragnarok is a reference to what Natasha does to soothe Hulk in Avengers: Age of Ultron.
26.A Stark-designed ship in Thor: Ragnarok requires that Thor use the name "Point Break," a reference to Tony using the nickname in The Avengers.
27.Marvel Cinematic Universe TV shows have a running joke of messing up that famous Spider-Man quote: "With great power comes great responsibility."
28.In Infinity War, Loki makes a reference to something Tony said to him all the way back in The Avengers, making it clear he's really switched sides.
29.Captain Marvel teases people who saw Captain America: The Winter Soldier by implying Fury will lose his eye by trusting a Coulson lookalike, only for him to actually lose his eye by petting a cat.
30.In Avengers: Endgame, Loki brings back (or maybe originates) his spot-on Captain America impression from Thor: The Dark World.
31.Steve gets tired of his own catchphrase after using it through three movies.
32.Steve almost re-creates his iconic elevator fight from Winter Soldier in Endgame until he realizes the one thing he could have said to walk out without fighting.
33.Thor references the shawarma lunch from the Avengers mid-credits scene in Avengers: Endgame.
34.James D'Arcy returns in Avengers: Endgame to play Edwin Jarvis, Howard Stark's butler who we first met in Agent Carter.
35.Sam finally gets to say, "On your left," back to Steve in Endgame after hearing it so much in Winter Soldier.
36.Steve finally says, "Avengers, assemble," for the first time in Endgame after teasing it in Age of Ultron.
37.Agents of S.H.I.E.L.D. references Wolfgang von Strucker and the fact that he gave Scarlet Witch and Quicksilver their powers, which we saw in the credits of Captain America: The Winter Soldier.
38.Peter activates "Instant Kill" again in Endgame, but on purpose this time, unlike when he accidentally activated it in Spider-Man: Homecoming.
39.Scott gives Hope a look after she calls Steve "Cap" in Endgame because she teased him throughout Ant-Man and the Wasp for doing the same thing.
40.Tony's last words in Endgame before sacrificing himself to save the world are the same words he ended his first movie with.
41.Steve and Tony prove each other wrong one last time in Endgame, years after their big argument in The Avengers.
42.Harley, Tony's friend from Iron Man 3, attends Tony's funeral in Endgame.
43.Morgan asks Happy for cheeseburgers at the funeral, the same thing Tony asked for after escaping his abductors in the first Iron Man.
44.Tony's first arc reactor, which Pepper turned into a keepsake in Iron Man, also appears at his funeral.
45.Steve and Bucky say goodbye in Endgame the same way they did before Bucky left for war in The First Avenger.
46.Steve and Peggy dance in Endgame to the same song that was playing on the stereo when Nick Fury broke into Steve’s apartment in Winter Soldier.
47.Captain America: The Winter Soldier mentions Stephen Strange as a target of Project Insight two years before the release of Doctor Strange.
48.In Far From Home, Happy turns on "Back in Black," the song that the Jon Favreau–directed Iron Man opens with, but Peter Parker is too young to recognize who it's by.
49.Both Spider-Man: Homecoming and Spider-Man: Far From Home end with a cut-off "What the f—?"
50.Batroc calling Sam's new uniform a "bird costume" in The Falcon and the Winter Soldier is a reference to the UN calling his old suit the same thing in Civil War.
51.Sam says the same thing to Karli in The Falcon and the Winter Soldier that Steve said to Bucky in Winter Soldier.
52.When Bucky refuses to move his seat up in TheFalcon and the Winter Soldier, it's payback for Sam not moving his in Civil War.
53.Natasha and Clint reference a mission in Budapest in Avengers and Endgame, but we don't find out what the mission was until Black Widow.
54.In Eternals, not only does Kingo claim he knew Thor as a kid, but Sprite also calls Captain America "Captain Rogers," which suggests she may know him personally or at least through the military.
55.The guy who asks Spider-Man to do a flip in Homecoming is the same guy who livestreams the bus fight in Shang-Chi.
56.The tower at Kate's school in Hawkeye is named after Obadiah Stane from Iron Man.
57.Yelena lands on the roof in Hawkeye in a pose that's very similar to the one she made fun of in Black Widow.
58.In Spider-Man: No Way Home, you can spot a few billboards for Rogers: The Musical, which Clint took his kids to in Hawkeye.
59.Yelena mentions a "new and improved Statue of Liberty" in Hawkeye, but the giant Captain America shield being added to it is not revealed until Spider-Man: No Way Home.
60.There's a bus ad in Moon Knight for the GRC, or the Global Repatriation Council, which is the international council in The Falcon and the Winter Soldier that's in charge of managing the refugee crisis following the Blip.
61.Finally, there's also a line in Moon Knight that suggests Layla has been to Madripoor, the criminal haven we first saw in The Falcon and the Winter Soldier.
Did we miss your favorite Marvel callback? Let us know in the comments!