https://www.christianpost.com/news/xbox-one-backward-compatibility-january-titles-include-the-witcher-2-assassins-of-kings-and-soulcalibur-155698/?mobile=true
Microsoft has released its list of Xbox One Backward Compatibility titles for January 2016, along with some changes it will be making to the program.
xbox onebackward compatibilitythe witchertitlesjanuary