Star Fox Zero is a game that has already gone through a number of release date changes. The game was first shown off at E3 2015, marketed as a big holiday game. It was soon announced though that the latest Star Fox game was being moved to a 2016 release.
The release date for Star Fox Zero is now set at April 22, 2016, unless a few updated web pages are to be believed. A number of French retailers changed their pages for Star Fox Zero this week, now showing a July 15, 2016 release date. Details for other big Nintendo games, including Twilight Princess HD and Pokken Tournament were released this week, so this info could be spot on.
If Star Fox Zero has indeed been delayed again, it may be disappointing, but ultimately a good thing, as many fans lamented the game's apparent lack of polish in early footage.