What do you think was the biggest risk in the Marvel Cinematic Universe? Iron Man (first film), The Incredible Hulk (first reboot), Iron Man 2 (first sequel), Thor (first out-there property), The Avengers (first team-up film), Iron Man 3 (first film after Avengers), Guardians of the Galaxy (first obscure property for casual and some hardcore fans), or Agents of S.H.I.E.L.D. (first show)?