A new Star Fox Zero trailer was shown during today's Nintendo Direct, giving tons of new details about the game's mechanics. At the end of the trailer, the official launch date for the game was finally revealed to be April 22nd, 2016.
The trailer reviewed us a bunch of details on the game's vehicles and basic mechanics. They showed off the classic Arwing, which has added some new mobility and controls. The Landmaster is returning as well, with the new ability of targeting three enemies at once, and a new aerial form that allows it to fly for short periods of time. They also detailed the Gyrowing, a new Star Fox vehicle that we had previously seen at E3.
Source: Nintendo Direct