So, you know your Infinity War from your Infinity Gauntlet, your Captain Marvel from your Ms Marvel, and can name pretty much every random bystander in The Avengers - you are, in short, a Marvel buff of high standing.
The thing is,though - there's a whole lot more to the MCU than meets the eye - and a lot going on behind the scenes that we never get to see.
On that note, then - can you name the Marvel movie from its original working title?
Head below to find out...
Answer: Iron Man 2
2. Group Hug
Answer: The Avengers
4. Full Tilt
Answer: Guardians of the Galaxy
5. Caged Heat
Answer: Iron Man 3
6. Freezer Burn
Answer: Captain America: The Winter Soldier
Answer: Captain America
Answer: Captain America: Civil War
9. Thursday Mourning
Answer: Thor: The Dark World