Chapter 180 of "Assassination Classroom" is now online through D-Manga. This is the final chapter of the manga and it provides an update on the students who had been part of Korosensei's class. However, not everything is ending on the manga. Before any predictions on the possible arc and movie, here's the recap of the final chapter of "Assassination Classroom."
The final chapter highlights the success of the students under Korosensei. Manami and Takebayashi achieved success through their research on artificial blood that was handed down to them by their former teacher. Sugino is now a star college baseball player while Terasaka is under the wings of a major politician. Mushida and Muramatsu took over the family business while Itona continued her work on the factory.
Before the chapter ends, Kayano was asked about Nagisa. It was later revealed that Nagisa, even though still small, is now a teacher and immediately showed his true power to his students on the first day of class. When someone threatened to kill him, he replied, "Good luck with that, you have until graduation."
As the manga ends, the live action film of the manga/anime adaptation is set for release this March 25. According to Aramajapan, the title of the upcoming film is "Assassination Classroom: Graduation" and from the title alone, it looks like that the final movie would focus on the final chapters of the manga. The teaser posted on Vimeo also features some exciting battle and it could focus on the final battle of Korosensei.
Fans of the anime and manga should also anticipate another story of Korosensei. Although the manga has finally ended, there will be another story for Korosensei since the cover of the final chapter. Based on the announcement, the upcoming story will have new students and will only run for four chapters. As of this writing, there is no announcement on the release of the mini-arc on Korosensei.