In an interview to the Official Playstation Magazine (reported by GamingBolt), Jerk Gustafsson, executive producer of the game at MachineGames, spoke about how players will be able to choose between main and secondary missions more freely during the game:
I think players will see a lot of similarities to level design in the Dishonored games, so in that sense it can be a little bit different as an experience but it can be for the benefit of the game, especially when it comes to finding different ways of approaching a combat scenario or a mission in general.
The game is also developed by the French studio Arkane – part of the Bethesda/ZeniMax group -, which is famous for many games including the Dishonored series. This will have a big impact on the gameplay of the game and the main storyline:
The open-ended structure and co-op aspect has made it a little more difficult when it comes to the narrative. We do think we have a strong story, but it’s quite different from what we have done before; it’s a little bit lighter, not only in tone but also when it comes to the amount of content, and I think that’s the big change when it comes to previous titles: the campaign is a bit shorter but the amount of gameplay time is greater.
Players will be able to stay in the game for a long time,” he added. “We’ll add additional side-missions and new challenges once the campaign is completed. There’s a lot more activities and side-missions that you can do in Wolfenstein: Youngblood than in previous Wolfenstein games.
This is a natural evolution for the Wolfenstein series that was already attempted in the Wolfenstein game of Raven Software (2009), but with less success, as I explained in this article of 2016 about the future of the series.
Here is a gallery of screenshots for the game, which will be released on July 26, 2019, on PC and consoles.