As stated previously, Wolfenstein 2: The New Colossus‘ final story DLC, The Deeds of Captain Wilkins, is available to download now. In this DLC, players take on the roll of Captain Wilkins (which I am sure you never saw coming), and journey to Nazi controlled Alaska to dismantle a Nazi superweapon- standard Nazi story fare.
Now, if you need any more selling on the DLC than that, then this gloriously over the top launch trailer for Wolfenstein 2: The New Colossus: The Deeds of Captain Wilkins that was made available today should help. You can watch the trailer for yourself below.
You can get the DLC as pat of the $25 “Freedom Chronicles Season Pass”, or standalone by itself. It is available, much like the game, for PS4, Xbox One, and PC. Wolfenstein 2: The New Colossus, and presumably its DLC (including this), will be made available for Nintendo Switch some time later this year.