One idea could be a crossover with 'Attack on Titan'. The children from The Promised Neverland could find themselves in the world of Titans. They'd use their intelligence and survival skills to figure out how to deal with the Titans, perhaps even finding a way to communicate with the abnormal Titans. Another plot could be a crossover with 'Fullmetal Alchemist'. The alchemical knowledge in that world might offer new solutions to the problems in The Promised Neverland, like finding a way to create a safe haven using alchemy.
In a crossover with 'One Piece', Luffy would be an interesting addition. His carefree yet determined nature could inspire the kids from The Promised Neverland. He could also use his rubber powers to help them in their escape or fight against the demons. Another great character would be Light Yagami from 'Death Note' if we consider a different kind of crossover. His intelligence and strategic thinking could be a huge asset to the kids, though his morally ambiguous actions would also add an interesting dynamic.
Oh, it's very good. The way the story progresses and the unexpected twists make it a must-read. The art style also adds to the overall appeal, making the manga visually captivating.
Oh yes! The Promised Neverland manga is a masterpiece. It combines elements of horror, adventure, and drama perfectly. The plot twists are unexpected and the themes it explores are deep and thought-provoking.
Yes, the Promised Neverland manga has finished. The ending might have left some fans satisfied while others might have had different expectations, but it marked the completion of the series.