In terms of open-world game design, World Seeker isn’t an innovator, but it borrows and re-imagines familiar mechanics well (from the Batman: Arkham games, in particular) and proves why they are perfect for the One Piece universe.
The latest trailer for the upcoming open world One Piece game, World Seeker, shows off a fair bit of the combat gameplay, and it also details how you will acquire and complete sidequests.