Can't narrow it down to one, but Xenoblade Chronicles X, Fallout 4, Horizon Zero Dawn, and Zelda U have all really hyped me up. Final Fantasy XV and No Man's Sky areclose to matching those as well but I've never seriously played a FF game and NMS more fascinates than hypes.
Still, don't think any of these match my crazy hype I had for Skyrim back in 2011. That announcement trailer was sick and that gameplay trailer really brought the hype. Good times.