Nintendo released a "Making of" video for Legend of Zelda: Breath of the Wild today, which reveals the inside work, concept art, and development process of the new game.
The video is in three parts. The first segment talks about development, which began January 2013. Even back then, they wanted to "Break the conventions of the Zelda series" which lead to the open world we have today. Here's part one:
The second video consists of story and characters. Both concepts and final products.
The final video is titled "Open-Air Concept" which focuses on the open-world aspects of the game, why the decided upon them and how previous games lead them to it.
The Legend of Zelda: Breath of the Wild received perfect scores from many review websites. Check out our review here.