Promotional Zelda BOTW poster says "out in march 2017".

[CaptainExplosion2]

Pavolink said:

Estos carteles de GAME UK afirman que 'Zelda: Breath of the Wild' para Wii U se lanzará en marzo - https://t.co/CPi1YJzoOt pic.twitter.com/AN3lf7kjuv

— Nintenderos (@Nintenderos) December 30, 2016

Seems awfully convinving.