UPDATE 10/04/2015: The recently-updated Call of Duty website has been data-mined and thus we have new information about Call of Duty: Black Ops 3.
As reported by CharlieIntel.com, an official description for Treyarch's upcoming shooter was discovered within the source code of the Call of Duty website.
It confirms Black Ops is set "a dark, twisted future" where "the lines are blurred between our own humanity and the technology we created to stay ahead". So, we're going sci-fi again.
Elsewhere, Black Ops 3 includes three game modes: campaign, multiplayer and Zombies, as you'd expect.
Here's the description:
Call of Duty: Black Ops 3 is the first title for next-gen hardware in the critically acclaimed Black Ops series. Developed by Treyarch, the award-winning creator of the two most-played games in Call of Duty history. Call of Duty: Black Ops 3 deploys players into a dark, twisted future where a new breed of Black Ops soldiers emerges and the lines are blurred between our own humanity and the technology we created to stay ahead, in a world where cutting-edge military robotics define warfare. With three unique game modes: Campaign, Multiplayer, and Zombies, providing fans with the deepest and most ambitious Call of Duty ever.
UPDATE 09/04/2015 7.10pm: A new Call of Duty teaser has made it abundantly clear that Treyarch is making Black Ops 3.
Series publisher Activision released the following video, dubbed "Back in Black" to its Call of Duty YouTube channel.
The roman numeral for three combined with the word "black" in the title make it pretty clear that this is a teaser for the third CoDBlops game. Furthermore, there's an outline of the man from the cover of the first Black Ops briefly portrayed towards the end before it promotes a full reveal on 26th April.
Treyarch's official Twitter account added "It feels good to be back. It feels even better to be #BackInBlack. Let's do this."
ORIGINAL STORY 07/04/2015 11.23am: Activision has updated first-person shooter Call of Duty: Black Ops 2 with what looks like a tease for Black Ops 3.
YouTuber Drift0r released a video, below, after spotting mysterious symbols on the in-game advertisements in Black Ops 2 maps Plaza and Express.
As discovered by CharlieIntel.com, if you scan these symbols using SnapChat, a Call of Duty-related SnapChat account is added to your friends list. We've tested this out and it works.
The Call of Duty SnapChat account currently includes a short video showing the sun shining through forest trees, with a voiceover: "Listen only to the sound of my voice."
Call of Duty tradition dictates that the next game in the series is revealed around this time of year, with a campaign debut at E3 in June during Microsoft's press conference.
Everything is pointing in the direction of Black Ops 3, then. Plus, it's Black Ops developer Treyarch's turn, following last year's entry, Sledgehammer's Advanced Warfare, and Infinity Ward's Ghosts in 2013.