As it currently stands, Nintendo has two big releases scheduled for March 2017; its newest console, the Switch, and the next Zelda adventure, Breath of the Wild. Unfortunately, Zelda games are often prone to delays and several sources within the industry are now claiming the Breath of the Wild will not be an exception.
All together, frequent source of Nintendo rumors Emily Rogers, journalist Laura Kate Dale, and Eurogamer are all reporting Breath of the Wild will likely see a delay up to several months based on tips from multiple, anonymous sources. The reason for the delay is based on the alleged time frame for the game’s development. Supposedly, localization work won’t be finished until the end of the year, and then additional QA and testing could take up to six months. Assuming this is correct, a delay of several months would be required to match this schedule.
Of course, it should noted that nothing has been officially announced and everything so far is just a rumor. Nintendo has already stated its plans to give more details about Switch and its launch library in January, so it might not be until then that we hear whether or not this is true, so be sure to stay tuned.
Source: Nintendo Everything