I recently read something about Diablo 3 Ultimate Evil Edition (the version of Diablo 3 featuring the newest expansion pack announced for PS4) saying that it has actually been being developed for Xbox One and the people at Blizzard seem to want the game to come to the Xbox One. Unfortunately, it seems there is some sort of dispute with Microsoft. I'm hoping Microsoft and Blizzard will sort out whatever differences there seem to be and get Diablo 3 to the Xbox One. It would be terrible for all of us anticipating the game for Xbox One to be let down.
Check out the post here: http://www.videogamer.com/ps4/diablo_3/news/diablo_3_is_in_development_for_xbox_one.html