From what we saw at the end of the manga, what Eren hoped for came to pass. His remaining friends became heroes of humanity. While Armin acknowledges that the hate and violence will never fully fade from the world, humanity can finally move on, free from the Titans forever.
So, according to viewers, it seems that he wants to become a villain so that his friends are forced to eliminate him. This, in turn, might end up turning them into the heroes of humanity and stop the world from seeing Paradis Island or Eldians as threats.
We saw Mikasa's vision in Chapter 138 - but the final chapter meeting between Eren and Armin reveals that Eren is not the hardened villain he pretended to be. As it turns out, Eren carried out The Rumbling in order to force his friends and foes to band together and save humanity.
Kuklo saved humanity from the Titans. Kuklo, from the Attack on Titan: Before the Fall of Wall Maria, is the saviour of humanity. If you don't know the AoT:BFWM is set 60-70 years before the main story with Eren and the others. This was back when the walls had only existed for about 30-40 years.
As fans of the manga know, Eren takes the "Euthanasia Plan" to an insane new level wherein he unleashes the Rumbling upon the world and kills scores of innocent people, many of which had never seen war before that point.
The Depressing Reality of Eren - the REAl reason Eren is The FINAL Villain & Start The Rumbling!
What are Eren's true intentions?
Eren's goal is to eliminate the entire world except for Paradis, but keeping his fellow Paradisans alive is also extremely important to him, especially his close friends. After all, the elimination of his 'enemies' means nothing if the people he wants to protect aren't safe when it's all over.
Eren grappled with the dilemma of balancing what it means to revenge for his people's mistreatment as well as his people's hand in initiating the matter in the first place. Thus, his ultimate goal is to harvest the power of the Founding Titan to sterilize all Subjects of Ymir.
Mikasa married Jean & has kids. Paradis is now destroyed but the titans still exist. Yet to see how it's executed specifically on the paper but the leaks are making AoT 139 sound far worse than what it already was.
Attack on Titan has produced a lot of pairings for the fans to ship with one another. Mikasa ending up with Jean is just one of the pairings in the anime. In case you missed it, their ship is known as JeanKasa.
Attack on Titan Episode 84 reimagines Jean and Mikasa's married life in a short bittersweet dream. Attack on Titan Season 4 Episode 84 shocks everyone with an astonishing moment from Jean's reimagination of a married life with Mikasa, the girl of her dreams.
While there are many characters that he respects, Erwin Smith is perhaps the only character that Captain Levi has truly loved, which puts Erwin at the very top of the list. Levi's loyalty and devotion to Erwin also indicate that the two were meant to be together.
In the final scenes of Attack on Titan, Levi is seen living in Marley. He's wheelchair-bound and escorted around a city by Falco and Gabi. Levi is implied to live out the rest of his life in a strange, foreign country, his friends either dead or an ocean away.
Sad to say, Eren won't be good until the end of the series because of his goals and perspectives. But he isn't a villain either. By Chapter 139, Eren revealed his plan to Armin. He decided that he would be the bad guy so that Armin and the rest of the team will stop him and save humanity.
Eren wanted to cause the Rumbling to gain freedom from oppression and escape the uncanny clasp that the Titan fate had on him, on the Eldians, as well as the Marleyans. He saw how Ymir, Zeke, his father, the Marleyan Warriors, Mikasa, Armin, and the youth of Paradis were all enslaved to play their roles.
Ymir needed them because she was only a child who was the victim of terrible abuse. She needed Eren to help her free up all her pent up anger at the world because of what she experienced. She needed someone that understood her and could relate to what she went through.
How many people you think died in the Rumbling? Too many people to the point that Eren Yeager couldn't be forgiven for his actions. Attack On Titan seems to be around our WW1 time period since aerial warfare is being invented and tested. That puts the world at 1.6 Billion people.
Similar to witnessing Carla's death, seeing his friends die caused Eren a lot of pain, resulting in him becoming an antagonist. Some of the friends he had for years in the 104th Cadet Corps were killed when the titans invaded Trost.
He serves as Reiner Braun's archenemy and is the half-brother of Zeke Yeager. While initially presented as an heroic protagonist, Eren gradually becomes more of a morally ambiguous anti-villain by committing several violent acts for the sake of Eldia.
The defining feature of Eren's Founding Titan is a huge, snaking spine. This look is because Eren was decapitated by Gabi when he transformed, which caused the spine to grow abnormally so it could reconnect his body.
Eren has the same bony structure, but because his head was severed at the neck, his freaky Titan spine grows uncontrollably before connecting his torso and noggin, coming to form almost Eren's entire Founding Titan.