The game will be available across Xbox One, PlayStation 4, and PC. Pricing was not announced, but the digital edition sells for $20, so something in that area would seem likely.
Note that this is not a bundle that includes The New Order and The Old Blood, only The Old Blood. But The Old Blood is a standalone game, so you don't need a copy of The New Order to play it.
Here's the story for The Old Blood, boiled down to its key points, courtesy of Bethesda.
"The year is 1946 and the Nazis are on the brink of winning World War II. In an effort to turn the tide in the allies' favor, B.J. Blazkowicz must embark on an epic, two-part mission deep within Bavaria…"