When Robert Downey Jr. appeared at San Diego Comic-Con earlier this week to discuss the upcoming Avengers: Doomsday, eagle-eyed fans quickly spotted that his outfit appeared to contain a hidden message.
The 61-year-old actor, who helped launch the Marvel Cinematic Universe in his role as Iron Man, will this time be taking on the very different role of villain Doctor Doom. At Comic-Con, he wore a custom jacket embroidered with a series of mysterious runes.