2.Before sending Hulk back to Earth in Avengers: Infinity War, Heimdall says, "All-Father, let the dark magic flow through me one last time." This is a reference to what Loki says to Thor when he arrived on Earth in the Avengers.
3.The lamps in Wanda and Vision's room match the colors of their respective powers.
4.The old flip phone Tony Stark has is the one Steve Rogers left for him at the end of Captain America: Civil War.
5.When Iron Man uses his nano-tech suit, it even absorbs his sunglasses.
6.When Star-Lord tells the group to put on their mean faces as they're approaching a distress signal, Mantis actually changes her expression to fit his request.
7.Groot is seen playing a handheld game called Defender, an '80s arcade game in which the player must defeat waves of invading aliens.
8.In one scene, Peter asks Tony if he's ever seen Aliens. Later, Tony has Drax pinned to the ground and his gun resembles a Xenomorph, creating a visual similar to a classic moment from Alien.
9.When Star-Lord describes Thor as "not that good-looking," Spider-Man can't help but react with a confused expression.