1. Spider-man and Captain America Once Fought the Titans

Ever wonder how popular superheroes like Captain America and Spider-Man would fare against the vile giants of Attack on Titan? Marvel’s collaboration with Attack on Titan creator Hajime Isayama has it covered. In a crossover comic titled Attack on Avengers,the eight-page adventure plays out the scenario of what happens when Titans invade the Marvel Cinematic Universe. Written by Isayama and illustrated by Gerardo Sandoval, the epic crossover was originally published in the Japanese magazine Brutus. Attack on Avengers has since been released digitally for free as part of Marvel’s Free Comic Book Day issue Secret Wars #0.
2. The Series' Greatest Mystery isn't the Titans... it's the Wall

Attack on Titan’s commercial bumpers contain a load of informational texts and diagrams that expand on story elements barely covered in the anime episodes. One, in particular, stood out in the final episode of Attack on Titan Season One which reveals a rather startling fact about the giant wall's makeup. In the year 784 on a blistering hot night, a miner decided to dig under Wall Sina in hopes of living a better life on the other side. No matter how far he dug, the wall never seemed to end. Eventually, he dug so deep that he ran into a layer of bedrock made of the same material as the wall.
3. Sasha Blouse was Originally Supposed to Die

Everyone’s favorite food-loving goofball, Sasha Blouse (aka Potato Girl) has become one of Attack on Titan’s most precious characters. Did you know that Hajime Isayama originally planned to kill her off? In the early version of the manga, her character was supposed to die at the end of Volume 9. However, Isayama’s editor cried in the bathroom after reading the storyboard, which convinced him to rewrite the chapter and spare Sasha’s life. The decision was a close call, especially since most of Attack on Titan’s characters don’t get the same sympathy.
4. The city is based on a real place in Germany

In
Attack on Titan, the last vestiges of humanity live in a city that is protected by several massive walls that are so huge no Titan could possibly break them (or so people thought). The three walls are called Maria, Rose, and Sheena.
Attack on Titan opens with Wall Maria being torn open by the Colossal Titan. The second wall is breached by the Colossal Titan when Eren Yaeger is finally old enough to join the Survey Corps. Luckily, Eren transforms into a Titan for the first time, which gives him the power to seal up the breach and save the inhabitants of the city. The unnamed city in
Attack on Titan is actually based on a real place. The inspiration for the city comes from Nördlingen, which is in Germany. Nördlingen has existed for over a thousand years and is one of only three German cities that still has a wall around its perimeter. Hajime Isayama clearly used the gothic style buildings as the inspiration for the homes within the world of
Attack on Titan.
5. Armored Titan

The armored titan character is inspired by an American pro wrestler named Brock Lesnar.
6. Eren’s titan form

Isayama has revealed that Eren’s titan form, is derived from Yushin Okami, a Japanese martial arts personality.
7. Attack on Titan Ending

Isayama revealed in an interview that he was going to make everyone dying by the end of Attack on Titan. In Conclusion, he changed this terrific ending tragedy.
8. Eren’s Mom

Eren Mom is voiced by the actress Yoshino Takamori, she also voiced Trisha Elric in Fullmetal Alchemist the weird thing is in both Animes she was a mother, who died from the first episode.
9. Erwin Smith

Erwin character was inspired by the German marshal Erwin Rommel, known for his unique skills. As a commander during the world war II, he always rejected orders from his superiors that he felt were unjust.
10. Hange Zoe
Hange Zoe is described as a female in both anime and live action movie, but in the Attack on Titan manga, her gender isn’t so clear, and Isayama said that her gender is up to the manga’s fans to decide.