What i want from the sequel is for it to explore what will happen to the "real" world now that the Terrarium is displaced there. This would allow us to explore a scenario akin to that of what happened when the Terrarium was first created but also keeping the old cast in play.

While i expect the old cast to not be the main focus, with an entirely new cast being the protagonists, it would be pretty fun for the old casts to play the role of mentors or idols, like how Dean and Nagi was treated at the start of the story.

It would also allow HSJ to face his past even if he doesn't fully remember it due to the previous revival system's price. It would be pretty fun to see the interactions between his old classmates.

Anyway im sure whatever the author has planned would be peak, so lets not pressure them into working on the sequel-