I dunno, I kind of like the idea. I mean it would be my first time fighting a ninja astronaut pirate chef who kills people with their thumb....seems worth it just to see what that would look like.
However, I'm thinking instead of having it be just another area of different enemies, as I'm almost positive there are some areas no player has gotten to yet, it might be better to make it some sort of PvE challenge. What about if we make this badass pirate chef (maybe named Sanji?

) be a boss that instead of matching level with players would continually have their stats scaled up for each time the player beats them and different gem pouches to keep fighting them interesting? I know it's a pretty lame way to increase their difficulty so if anybody has a better idea for the pirate chef I'd love to hear it.