Here is the relevant segment of the interview, as translated on Gamepressure.com:
TVN: Apart from the movie, on set of which we are now, are there any professional challenges waiting ahead of you?
Alicja: Yes, I’m still working on a computer game; I already did the first part, now we’re working on the second one, and it will take roughly two years.
TVN: You’re obviously doing it in the US?
Alicja: Yes, we’re doing it in the US.
In case there was any doubt about what the project in question is, at another point in the interview she mentions that as a child she enjoyed playing the game’s early iterations from the 80s and 90s, particularly “the moment when she could shoot Hitler.” At the time of this writing there has been no official announcement of the game. According to her timeline, though, we should expect the sequel to arrive no sooner than late 2017.
Starting as a series of WWII-set side-scrolling action/stealth games in the 80s, id Software took over the franchise in 1992 with Wolfenstein 3D, one of the earliest and most influential first-person shooters that established many of the conventions that id would further develop the following year with Doom. The franchised changed hands a few more times before falling to MachineGames, under the aegis of Bethesda, for 2014’s surprise hit Wolfenstein: The New Order.