Treyarch Studios, have just confirmed Call of Duty 2015 to be Black Ops 3. They have changed their Twitter Banner to the image shown above, and tweeted out "It feels good to be back."
They have also uploaded a teaser video on the Call of Duty YouTube Channel, with an Official World Reveal Date of 4.26.15.
David Vonderhaar, the Studio Design Director has also changed his Twitter Banner, and Profile photo to Black and Tweeted out "How far are we willing to go? Blackout. See you soon?"