https://www.gamespot.com/articles/call-of-duty-ww2s-campaign-length-estimate-reveale/1100-6454565/

Call of Duty: WWII is almost here, and it marks a return for the series in a number of ways. Most notably, the game takes players back to familiar territory, with WWII serving as the backdrop of its multiplayer and campaign modes. Activision revealed a slew of details about the story mode leading up to the game's release, and now we another important bit of information about it: its length.

GameSpot's Miguel Concepcion played through Call of Duty: WWII's single-player campaign for our review, which will go up on the site soon. On the game's Normal setting, it took him about six hours, 23 minutes to clear the campaign, not including the time it took to watch the credits sequence. That's generally about the length of a typical Call of Duty campaign, so veterans of the series won't be too surprised by this news. You can check out the opening portion of the story mode above.