Can't link source for above because it's from a scan but you probably know who.The latest issue of Weekly Jump reveals One Piece: Unlimited World Red Deluxe Edition for PlayStation 4 and Switch. It will launch on August 24 in Japan for 4,800 yen.
One Piece: Unlimited World Red Deluxe Edition is an updated version of One Piece: Unlimited World Red, which was released for PlayStation 3, Wii U, PS Vita, and 3DS. It includes the downloadable content from the previous release, and supports two-player offline cooperative multiplayer.
While Weekly Jump, being a Japanese magazine, makes no mention of a western release, Bandai Namco trademarked ”Unlimited World" in Europe on March 21, suggesting a release is planned.
Update:
First trailer: https://www.youtube.com/watch?v=kUAvLgtjEt0
Some more details (including frame rate info):
Due out for PlayStation 4 and Switch in Japan on August 24, the game is an upgraded version of the 2013-released One Piece: Unlimited World Red. It runs at a maximum 60 frames per second in 1080p on both platforms (720p in Table and Handheld modes for Switch), includes 51 pieces of downloadable content (costumes and quests) released for the previous version, and supports offline two-player gameplay (including Joy-Con two-player on Switch). Some cast members, such as those for Red and Yadoya, have been changed.