Im not so certain fans expectations are impossible these days. If you look at the worlds that some games have crafted, how beautifully intricate and alive they feel, how well animated they are, giving such a level of immersion, it's not impossible at all.
Xenoblade Chronicles (minus the animation), The Witcher 3, Fallout 4, Horizon (from what's been shown) all show beautifully crafted worlds that feel alive. If Zelda can capture that, improve on its jarring animations and provide the staple of the series in having epic dungeon design, then it will live up to and possibly exceed expectations!
I so hope it does! Not long now.