Fallout 4: Nuka World is due out later this week on Xbox One, PlayStation 4, and PC.
The star of the DLC, however, judging by what Bethesda have shown, appears to be something called the Nuka Cade, which has Nuka Cade games which are funded by pre-war money (finally, that has some use!).
The main hub of Nuka World is NukaTown, where the player will come across N.I.R.A., a Nuka Cola bottle shaped robot that seems to suffer from some form of dissociative personality disorder.
As he points out, as with all Fallout 4 DLC, the expansion begins by you intercepting a radio signal, which is followed by you getting to Nuka World.
…
FALLOUT 4 Nuka World Gameplay Breakdown - The Gauntlet, NukaTown, & NUKA CADE!