yea they have confirmed it, but I think i know where yur gettin at, and its not a bad idea at all. maybe adelle was sealed in the sword because it was some kind of evil, powerful deity or sumthin xD and then maybe she leads link into thinking shes a good person o: and then she leads link into collecting something that will break the seal, and then you fight her as the last boss O: well thats just me xD