It's worth keeping in mind that Activsion and Treyarch have not disclosed CoD 2018's setting, which means that we'll find out more information about this game later this year or around E3 2018.
While the game is claimed to be set in modern times, it's going to be boots on the ground, so can probably expect not to see futuristic machinery such as jetpacks in the game. We'll surely hear more reports and rumors about the 2018 Call of Duty game in the coming weeks. The job listing seeks a person to help make the 2018 edition of Call of Duty more "modern" by having a "Deep knowledge base of firearms and modern military technology".
He also goes into detail regarding the rumored Switch port of the game, talking about how it will support motion controls and is being developed by a company that has experience with working on the "Call of Duty" franchise.
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The Switch port is apparently being handled by "a company familiar with COD games", so it should be in good hands.
Meanwhile, details regarding the new entry to the first-person shooter franchise claim it will be set in modern times, which seems to be supported by a job listing posted by the publisher and developer previous year.
After the success of Call of Duty: WWII and the return to "boots on ground" style gameplay, we've been left wondering what's next for the series.
Industry experts believe that Activision has tapped the services of Treyarch Studios to develop Call of Duty: Black Ops 4. However, it has been established that it will be coming to the PlayStation 4, Xbox One, PC, and the Switch.