There’s the Black Sabbath T-shirt in The Avengers as a reference to the song “Iron Man,” the fact that Peter Parker is wearing a shirt that was once seen on Pepper Potts speaking to their dissolved relationship in Homecoming, and in Thor: Ragnarok, Banner is given one of Stark’s shirts to wear. On it, is an image of a Duran Duran album cover. Recall that one of their hit songs was Hungry Like the Wolf, and later on in the film, Hulk battles Fenris Wolf.