The name of this Tvshow is Attack on Titan The Final Season released in 2020 and it's main theme is The truth revealed through the memories of Grisha's journals shakes all of Eren's deepest beliefs. There is no rugged but free land beyond the walls. There is a whole other world, equally full of oppression and war. Suddenly, the ambitions that have animated the Survey Corps for generations seem small and naive. What is there left to fight for?