https://www.cnet.com/news/watch-the-call-of-duty-black-ops-4-reveal/

If you've ever played a first person shooter where your player heals automatically after escaping immediate fire, you have the Call of Duty franchise to thank -- it's one of the series that made that particular gameplay mechanic popular... but that feature isn't a part of Black Ops 4. Instead, the developers say that players will have to heal their characters manually. It's a change designed to open up the player's tactical options in multiplayer: you can fall back and heal, or risk it all and charge forward when your opponent isn't expecting it. Weapons are being tweaked, too -- giving each gun will have it's own set of attachments -- including something called "operator mods," that give weapons extra features they wouldn't normally have. The game has also made recoil unique to each weapon, making mastering each weapon a skill that needs to be developed.

If those changes all sound like they might be tweaking the Call of Duty formula to better fit the "sole survivor" gameplay of titles like Fortnite and PlayerUnknown's Battlegrounds, you're on the money. It all culminates to make "Black Out," the game's new Battle Royale mode.