Stan Lee does his cameo during the Doofenshmirtz's song "My Evil Buddies and Me."
Danny Trejo and Travis Willingham are the only crossover voice actors to not have played their respective Marvel characters in other Disney XD animated Marvel series.
Mission Marvel is a collective crossover of Avengers Assemble, Hulk and the Agents of S.M.A.S.H., and Ultimate Spider-Man.
Danny Trejo and Peter Stormare are the only crossover voice actors to not have played their respective Marvel characters in other Disney XD animated Marvel series.