The screenwriters and directors and creative masterminds at Marvel Studios are always making sure that no fan ever goes bored during any of the movies of the Marvel Cinematic Universe. Of all the film series, from Captain America to Iron Man to Thor and beyond, these movies are constantly referencing each other, as well as the other work done by these actors and artists. When Robert Redford showed up in Captain America: The Winter Soldier, the film made sure to pay tribute to the special relationship between him and Paul Newman. Likewise, Captain America: Civil War has an in-joke for fans of Arrested Development, a show that the directors had previously worked for. In other movies there are referenced between movies, as a characters tattoos in Ant-Man reference scenes in the first Iron Man, while a pair of crows in The Avengers ties back to the Thor series and Anthony Hopkins’ Odin character. But there are other Easter eggs and hidden secrets and inside jokes, too, like when Tony Stark calls his “Hulkbuster” armor “Veronica” - it’s because The Hulk’s love interest from The Incredible Hulk is named Betty. All in all, these movies are chock-full of a surprisingly layered mythology that is constantly referring back to itself!