Pixar feels like it has house advantage. Of course, Dory is 94 to Braves 78. with Zoo being a 98 to Ralph's 87. Dory like Brave also has earned more money to Zoo. But we're in the zone of everything is in the 90% for Best Animated feature, especially since Dory has 25 more reviews on RT than Zootopia, so it's not an equal 1:1 for critical review, so it isn't a fair fight. (that's kind of glancing blow, I'd have to research it more.) Back to Brave/Dory.
Brave won, despite being 9 points less on RT than Ralph. Dory is only 4 points less, with both being at very high percentages. So we have a high grossing, well received Pixar movie, the odds lean in it's favor.
Granted my normal argument could apply to Dory, since the only thing special is it's Pixar, but Pixar is a high water mark in animation, and naturally has advantages to that. Of course, with the rise of WDAS again we may see the tone shift, but even then, I feel Disney would push Moana harder than Zoo, sadly.
For transparency's sake, my horse is The Little Prince, so this is all academic to me, since my favorite won't win. (Though I'd love a Netflix distributed film to win, because it could cause interesting shockwaves in film distribution.)