User blog comment:Deathmanstratos/CONFIRMED FAKE:Modern Warfare Collection for Xbox One and PS4/@comment-1187559-20140522205810

Also, likely the biggest give away that this is fake; "New high-definition textures and lighting effects. Revamped sound system and amplified weapon ballistics". Why does this prove it's more than likely fake? Because Call of Duty is infamous for re-using assets. If either company wanted to put effort into making new sounds and textures they would for done it when they made the game in the first place, not for the revamped version.