User blog comment:Deathmanstratos/RUMOR: Activision may switch Call of Duty's Lead Platform to PS4/@comment-5358304-20140319032359/@comment-25494464-20140319131718

Well, look at it this way. At the end of a DLC/Game trailer, you see the whole Xbox thing at the end of it. For any major gaming events for Call of Duty (e.g. CoD XP), Xbox is the console that is used and is what sponsors the event (mostly). And then there's obviously the fact that Microsoft has had this DLC deal since either MW2 or Black Ops (can't remember). So yeah, Xbox is pretty much the leading platform.