"Famitsu asked series producer Eiji Aonuma, and Breath of the Wild director Hidemaro Fujibayashi what the changes meant, and this was their reply: Eiji Aonuma, series producer: “Well of course it’s at the very end. But, I get what you’re asking, it’s which timeline is it the end of?” Hidemaro Fujibayashi, director: “That’s… up to the player’s imagination, isn’t it?”
Aonuma: “Hyrule’s history changes with time. When we think of the next game and what we want to do with it, we might think, 'Oh, this’ll fit well', and place it neatly into the timeline, but sometimes we think, 'Oh crap', and have to change the placement. Actually, the decided history has been tweaked many times.” (laughs)"
— The Legend of Zelda: Breath of the Wild Has Been Added To The Series’ Official Timeline, Siliconera.