The Legend of Zelda could be coming to mobile devices soon, and that's huge news. If the insider sources The Wall Street Journal has been in contact with is to be believed, Nintendo is currently hard at work on a new mobile game based in the series, which could launch as early as 2018. This could certainly fit in with the strategy that Nintendo has touted before, as the company has announced it would be bringing several of its larger franchises to mobile devices. Currently there are only reports of a Zelda mobile game coming to fruition, but as always it could just be one announcement away before becoming a reality. Here are three things to know about a possible Legend of Zelda smartphone game.