User blog comment:Deathmanstratos/RUMOR: Activision may switch Call of Duty's Lead Platform to PS4/@comment-3171236-20140319004838

Of course, that will change when Microsoft makes another multi-million dollar deal with Activision to keep Call of Duty's lead platform as the Xbox One, and early access DLC for the Xbox.

Call of Duty is now what sells Xboxes. I don't think Microsoft wants Activision to make the PS4 their lead console.