The Fin Fang Foom Billboard
While the MCU is all about finding hidden details, people didn’t think about looking at the background in the first films. However, that didn’t stop the MCU filmmakers from putting in tiny, insignificant details for viewers to discover later on in the future. You probably noticed a prototype of the Cap’s shield in Iron Man, but there was something even more obscure that only diehard Marvel fans would’ve known.
In the first Iron Man movie, the filmmakers left a tiny reference to a pretty huge villain—Fin Fang Foom. If you look in the background and squint your eyes, you’ll make out the iconic supervillain’s image, which was taken directly out of one of the comic books.