Tom Holland is notorious for accidentally spoiling MCU secrets and so was surprised himself when he kept RDJ's Doctor Doom casting secret.

Tom Holland revealed on the “Rich Roll” podcast that he was one of the select few people who knew about Robert Downey Jr.’s bombshell Comic-Con reveal, in which it was announced that the former Iron Man/Tony Stark actor would be returning to the Marvel Cinematic Universe as the villainous Doctor Doom.

A new rumor surrounding Robert Downey Jr.’s Doctor Doom suggests that the actor might retire from portraying the big bad villain in the MCU after making a possible last appearance in Avengers: Secret Wars.