Personally, I'm not sure. In a way, they might be supposed to be mysterious and never explained; kinda like the Valar in Tolkien's mythology, or things like that. For example, while watching Star Wars for the first time, I was really disappointed when the midi-chlorians were explained; they just took away the mystical power known as the Force and replaced it with some random evolved mitochondria.
From another pov though, it would add to the particular game's story, and might also please many fans. It would also make the Zelda mythology more complete; however, this is not necessarily a good thing, because Zelda is a game series, not a fully developed world like what Tolkien invented.
Therefore, I'm not quite sure. Personally I am rather against it, but if they do it well, why not?