I'd suggest 'One Piece'. It has a vast world, diverse characters, and an epic adventure, much like 'A Wonderful New World'. The art style and the depth of the storylines make them comparable.
Chapter 147 of A Wonderful New World manga brings in fresh challenges for the main characters. There's a new mystery introduced that keeps you on the edge of your seat. Also, some long-awaited reunions happen, adding emotional depth to the story.
In chapter 25, the protagonist faces a significant challenge that changes the course of the story. There's also a hint of a hidden secret that will be revealed in the following chapters.
In the first chapter, the manga begins with the protagonist finding themselves in a fantastical place. They meet a few interesting characters and start to uncover the mysteries of this new world.