You know that Zelda prototype mentioned in my last post? Well, unfortunately it isn't the version that gives players the option of beginning the game with either the boomerang or the sword.
Does such a build exist? Probably--or at least it did at some point. After all, it was mentioned in the instruction manual (see first screenshot below) that accompanied the North American version of the game.
With any luck, that build of The Legend of Zelda will be the next to leak.
See also: 'It's a secret to everyone'