GamesRadar confirmed that all kinds of products have been listed under the patent, but we obviously don't know specifically what the Master Sword will be used for. MeltdownComics has noticed that the sword is broken into seven pieces — and seven seems to be a significant number. They wonder whether the seven pieces will relate to the islands in Tears of the Kingdom's Hyrule. There are also seven tears surrounding the mural, as JudetheDude21 points out, and there are GunnersnGames thinks we could be getting those tears from the seven sages. Of course, even if it looks that simple on the surface, there's always theories. SherbobHolmes thinks the bottom of the sword looks like a stylised version of Demise (which we've previously considered with TOTK).