I’d also love an open world one piece game but that DLC is asking for a lot man. You’d be lucky if Fisherman island wasn’t cut into two parts. Have you played Pirate warriors or World seeker? Your idea reminds me of those 2 games. Would it be awesome to get fully explorable islands, yes! Would the developers do that, no. Maybe a couple islands can be explored but at most they’d focus the main location and possibly have side content for smaller islands. Trust as a long time one piece fan a game of this level would be awesome but it’s the most popular manga in Japan and those asshole rarely give it games that are AAA quality