I'm guessing 90 to 94.
On one hand, it's a console Zelda. No main console entry since Link to the Past has done any worse than that. This includes games like Majora's Mask and Skyward Sword, which have alienated certain fans and newcomers.
That said, games have been getting slightly lower reviews since 2011 or so. In 2016, had 13 games with 90+ Metascores. 2011 had 30 of these. It's a pretty clear trend, albeit one that only seems to be affecting the top reviewed games.
But in the case of Breath of the Wild, I'm having trouble imagining it getting many scores that aren't at least near-perfect. Looking back at Skyward Sword, most publications with 5 point systems gave it the full 5 stars, and those with 10 point systems typically gave scores of at least 9.
A few websites gave Skyward Sword scores of below 80%, though these largely seemed to be based on clickbait as opposed to critiques that actually addressed the game's issues. I remember GameSpot gave it a 7.5 because they did not understand how to aim even after the game's instructions, and thus decided it had bad controls. And when they updated their review, the score was untouched. The actual problems of Motionplus were never addressed.
So the low 90's sound right.







