As expected, Crytek's Ryse is an Xbox One game.
An update on developer Crytek's website confirmed the news alongside a countdown that ends during Microsoft's E3 press conference in June.
"Exclusively for Xbox One" reads the website. "Fight as a soldier. Lead as a general. Rise as a legend."
Then: "Controller-based gameplay enhanced by Kinect," which suggests you'll be able to play the game with pad in hand.