Attack on Titan / Shingeki no Kyojin chapter 90 will serve as the conclusion to the Return of Shiganshina Saga, and the final issue of volume no.22 of Hajime Isayama's post-apocalyptic manga series.
Synopsis:
Historia Reiss decided to make everything public: the battle at Shiganshina, the death of commander Erwin Smith, the history of the world and true nature of the Titan as written by Dr. Grisha Jeager and her rise to power as the true ruler of the wall.
One year after attack on Trost District and six years after titans infiltrated Shiganshina, the military officially announced that Wall Maria once again habitable after wiping out all titans within the wall. By that time, the Survey Corps launched a mission outside the walls. Their aim is to verify if there's really an ocean waiting for them in the farthermost corner of Paradi Island.
Spoilers for Chapter 90:
-At the convention, Historia Reiss decides to make her reign public along with the secrets uncovered following the battle of Shiganshina. The results of the battle are also reported to the public, including the death of commander Erwin Smith.
While the reports stir mixed reactions among the citizens of the wall, the Survey Corps higher-ups believe unveiling the truth is best for all of them.
-At an event to honor Survey Corps members, Hitch greets the Heroes of the Wall for their accomplishment. Flock assures Hitch that her partner Marlowe was a hero till his last breath, though he also believes the deceased soldier regretted joining the Survey Corps.
Flocke's statement drew the ire of Jean Kirstein. He then had a beef with Eren Yeager, blaming him, Mikasa and Levi for making the wrong decision of picking Armin over the commander.
-Eren once again saw his father's past after touching Historia's hands. He saw his father pleading Frieda Reiss to save his family and the people of Shiganshina at the hands of invading titans.
-One year after the attack on Trost District, the military announced that Wall Maria is finally free of titan. The guillotine has exterminated all the titans the infiltrated Wall Maria following the incident at Shiganshina six years ago.
-And just before the citizens of Shiganshina re-enter the district, the Survey Corps launch a reconnaissance mission outside the walls, and their mission is to confirm the ocean in the farthest corner of Paradi Island.
-During their mission, they have confirmed that almost all titans have already been wiped out. Further down the road, they saw the execution stage where Marley turned Eldians into titans. And finally, Eren, Mikasa, Armin and the Survey Corps reach the Ocean.
-There, Eren confirmed what Armin told him back when they were kids, about a huge salty lake that exists beyond the wall. More importantly, Eren finds another resolve to finish the war with Marley, giving a hint of a forthcoming invasion of the Marley territory.
Get a copy of Attack on Titan Chapter 90 in the March edition of Bessatsu Monthly Shonen on February 9, 2017.