One of the main highlights is that Black Ops III's campaign will reportedly support co-op for up to four players online, no doubt a nice addition for fans looking for a more social experience outside of multiplayer.
According to the leaked materials, the online co-op mode will use the same network infrastructure that supports Call of Duty's online and Zombies modes.
Black Ops III's campaign also aims to deliver "cinematic, arena-style play," the leaked materials state. This mode has reportedly been "designed for co-op and replayability." Another new campaign feature for Black Ops III is that all player characters are now fully customizable--this ranges from weapons and loadouts to abilities and outfits, according to the leak.
In terms of multiplayer, the leak references a "new momentum-based chain-movement system," which should allow players to "fluidly move through the environment with finesse, using controlled thrust jumps, slides, and mantling abilities in a multitude of combinations." At the same time, players will have "complete control" over their weapons at every step, the leak says.
The materials go on to state that Black Ops III's multiplayer maps have been designed "from the ground up" to support this new movement system. Another new feature for Black Ops III's multiplayer mode is the introduction of a new "Specialist" character system--though further details were not provided.
Finally, the leaked Black Ops III promotional materials reveal that the game will have a Zombies mode (Treyarch created Call of Duty Zombies, after all) that will offer an "all-new horror story." This is described as a "full-game experience with its own distinct storyline." Black Ops III's Zombies mode will also reportedly feature a full XP-based progression system and more that will make it the "most immersive and ambitious Call of Duty Zombies to date."