The “unprecedented One Piece game” code-named “One Piece Game Dawn” and due to be revealed in the December 11 issue of Weekly Jump may be titled One Piece: World Seeker.
Gematsu discovered a test page at the URL opws.bn-ent.net, which is likely where the official website will be located when it launches. Bandai Namco has also filed trademarks for “World Seeker” in the United States, Europe, and Japan.
We will likely hear first details about One Piece Game Dawn, or One Piece: World Seeker, when information from Weekly Jump leaks later this week.
Update 12/06/17 at 12:10 a.m.: The latest issue of Weekly Jump has revealed One Piece: World Seeker for PlayStation 4. Read more here.