Trivia: Thanos' gauntlet bears a striking resemblance to the relic of the hand of St. Teresa de Jesus, one of the most important holy relics in Spain.
Trivia: The Avengers co-creator Stan Lee makes his usual cameo. This time as a man being interviewed by a news reporter asking about superheroes, at the end of the movie.
Trivia: Once again, Stan Lee makes his usual cameo. This time, he appears as a judge at the Christmas pageant. (01:03:50)
Trivia: Stan Lee makes his customary appearance as the driver of the white pickup truck that tries to free Mjolnir from the ground. (00:36:10)
Trivia: Stan Lee makes his usual cameo as the guy that accidentally gets his car shrunk by Hope during the climactic chase. Sadly, this was the last Stan Lee cameo released before his death in November, 2018. (Although he had already filmed cameos for several other upcoming films before his death).
Trivia: Stan Lee's cameo actually references another cameo he made as himself, in 1995's Mallrats - he's reading the script for that on the train. This marks the first time he's explicitly himself in a Marvel Cinematic Universe film (he identified himself as Stan Lee in Fantastic 4: Rise of the Silver Surfer), not just a random character. In fact Guardians of the Galaxy, Vol. 2 confirms he's actually playing the same character in every cameo, a Watcher Informant, roaming the multiverse and reporting back his discoveries. And given he's reading the Mallrats script here, that means Stan Lee himself was actually an alien being all along, observing humanity and others. And of course that means the real Stan Lee exists in the MCU, so created comics based on characters who really exist, albeit maybe in another universe...but you could go on like that forever.
Trivia: Stan Lee cameo: When Captain America did not come out for one of his shows, a short man came out to tell the announcer he would not be appearing. Stan Lee says "I thought he would be taller."
Trivia: Stan Lee makes his usual cameo, this time as a patient at the asylum where Selvig is being held.
Trivia: Stan Lee makes his customary cameo appearance as a security guard at the Smithsonian who is present when Steve Rogers steals his original Captain America suit from the museum display. (01:30:00)
Trivia: Samuel Jackson spotted that the eye patch his character wears in the movie switched eyes in the promotional posters announcing the movie in Los Angeles.
Trivia: Stan Lee makes his customary appearance when Rocket Raccoon is sweeping the plaza for likely targets - he is seen chatting up a young lady. (00:16:00)
Trivia: Stan Lee makes his customary appearance whilst the Avengers and a load of War Veterans are enjoying a get together. Thor offers a 1,000 year old Asgardian drink to Captain America, and Stan Lee asks for some. (00:25:15)
Trivia: Garrett Morris makes a cameo as the man in the car when Scott hits its roof. Morris was the first person to portray Ant-Man in a 1979 sketch for Saturday Night Live called Superhero Party.
Trivia: Stan Lee makes a cameo at the end of the movie as the FedEx man who says "Are you Tony Stank?"
Trivia: Stan Lee (Stanley Martin Lieber), the original creator of this comic book hero, has his usual cameo role in this movie. He's the guy who drinks the gamma contaminated soda from the fridge.