Avengers: Endgame was loaded with characters from the Marvel Cinematic Universe's 10-year history. It went back to Thor: The Dark World and brought Frigga and Jane Foster into the mix. Howard the Duck made an appearance in the final fight scene. Nick Fury showed up at the very end. Peggy Carter, the Ancient one, and Howard Stark all appeared briefly. None of those, however, were the most difficult cameos to pull off according to Avengers: Endgame co-director Anthony Russo.
The most difficult cameo was actually one which casual fans might not have picked up on.
"The hardest one was a scene in the movie where it's the scene in the diner where we introduced Smart Hulk the first time," Anthony Russo told Cleveland.com. "So, he's sitting there with Ant-Man, Black Widow and Captain America, and there's these three kids that walk in who are fans of Hulk. They want a picture with him. And those three kids are, one is my son Julian. One is my brother's daughter, Lia. One is my sister's son, Augie."
As it turns out, the most difficult element of pulling off the cameo was working the kids' schedules into the production schedules while also taking into consideration their school schedules.
Avengers: Endgame is available now on digital downloads and blu-ray. The movie will not be heading to Netflix as Marvel Studios films have in the past. Instead, Marvel projects will be available exclusively on the Disney+ app which is slated to launch later this year, including Hulu and ESPN+ in its bundle.
Other upcoming Marvel Studios projects include Black Widow on May 1, 2020, The Falcon and The Winter Soldier in fall 2020, The Eternals on November 6, 2020, Shang-Chi and the Legend of the Ten Rings on February 12, 2021, WandaVision in spring 2021, Loki in spring 2021, Doctor Strange in the Multiverse of Madness on May 7, 2021, What If? in summer 2021, Hawkeye in fall 2021, and Thor: Love and Thunder on November 5, 2021.