Nuka World Price
Nuka World is going to much larger than Contraptions Workshop ($5) and Vault-Tec Workshop ($5) which means it's going to command a steeper price point.
The upcoming DLC is going to be priced at $19.99 USD, £19.99 GBP, $29.95 AUD. So, $10 more expensive than Automatron and $5 cheaper than Far Harbor. And a third of the retail price of Fallout 4 if you're counting.
Again, it's also part of the $50 Season Pass which nets you Nuka World and every piece of Fallout 4 DLC for one discounted price. ($10 off.)