This is such a good idea that I'm amazed none of the sequels took advantage of it... It would have been more interesting than Golden Keys, for example. What if LeChuck was looking for four distinct objects around the Caribbean. The Voodoo Lady thinks it's for one reason, only for Guybrush to discover later in the game that they're part of a "New, Old, Borrowed, Blue" voodoo wedding curse.
Be such a fun twist.