Ryse, without doubt if we're talking exclusives only.
Then comes Titanfall, Forza 5 and Quantum Break.
If we're including multiplats then it's a different story (Witcher 3, Dragon Age Inquisition, MGS5, Battlefield 4, Watch Dogs, The Evil Within, Thief 4, Elder Scrolls Online, Assassin's Creed 4, The Division etc etc).
Multiplats is where the quality is. I can not remember any generation that promised so much this early.