One Mind Blowing Secret From Every MCU Movie

Think you know everything about the MCU? Think again.

By Scott Banner /

Since its inception in 2008, the Marvel Cinematic Universe has grown to become one of the biggest, most talked-about, highly-publicised movie franchises in the world. The "Marvel movie" has essentially become a film category in itself and has taken its place in the world as a genuine pop culture phenomenon.

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With the marketing machine for the franchise churning almost constantly, there are always behind-the-scenes facts floating around, as well as stories and rumours from the sets and beyond. Everyone knows that "He's a friend from work" came from a Make-A-Wish recipient in Thor: Ragnarok, and that Robert Downey Jr. improvised the iconic "I Am Iron Man", but what about the lesser-known stuff?

Pulling from interviews, director commentaries, other bonus DVD featurettes, and heavily from Joanna Robinson, Dave Gonzales, and Gavin Edwards' in-depth look at the MCU, The Reign of Marvel Studios, this list will focus on those secrets that will hopefully come as new information to most.

There have been devastating knock-on effects from an actor's on-set injury, foreshadowing that absolutely nobody would ever notice by themselves, scrapped plans that have changed multiple projects, and many more behind-the-scenes secrets, some of which are bigger than others, that may shed some new light on the MCU.

37. An Argument With The Pentagon - Iron Man

As the first outing from a brand-new studio that had no guarantee past four films, let alone what the MCU would ultimately become, Iron Man got a lot of things right in 2008. One such aspect, admittedly not as important as others, was working with the Pentagon in order to properly portray the US armed forces.

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Through Rhodey (Terrence Howard), there was a heavy influence from the military, something that benefited from Marvel Studios and Jon Favreau working with the Department of Defence, allowing them use of military equipment and Edwards Air Force Base in California.

Part of this is giving a surprising amount of creative final say to the Pentagon, who, according to the aforementioned Reign of Marvel Studios, took exception with only one line of dialogue. Namely, a serviceman who said he would "kill himself" for the opportunities Tony Stark (Robert Downey Jr.) had had in his life.

Favreau didn't see what the big deal was, but the DoD wanted no one enlisted saying things that made light of suicide. An incredibly awkward, heated argument ensued while on set at the air base, something that wasn't stopped until an alternate line of walking over hot coals was floated. Favreau and Marvel Studios really wanted to be as uncompromising as they could when it came to Iron Man.

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