Avengers: Age Of Ultron - 10 Things Joss Whedon Doesn't Want You To Know

8. Loki And Heimdall's Cameo

Late last year, Thor star Idris Elba ruined one of Avengers: Age of Ultron's biggest surprises when he revealed that he would appear in the sequel alongside Chris Hemsworth and Tom Hiddleston. What these scenes will consist of isn't clear, but like Chris Evans' surprise cameo in Thor: The Dark World, this is likely something Marvel didn't want revealed to fans. When asked about the leak, Joss Whedon didn't seem at all happy and indicated that both he and Marvel Studios President Kevin Feige would be getting in touch with the actor about his comments. How much this jeopardizes Elba's future in the Marvel Cinematic Universe remains to be seen, but the director definitely didn't want you to know about this.