It looks like the upcoming Nuka-World DLC will be the last one produced by Bethesda for Fallout 4. That's what Bethesda's Vice President of Public Relations/Marketing Pete Hines said on Twitter a couple days ago, as you can read below.

　　Just a few days ago, the Contraptions Workshop DLC was released adding things like conveyer belts, scaffolding kits, track kits, elevators, greenhouse kits, warehouse kits, fireworks and more for all those interested in building Fallout 4 settlements.

　　The Nuka-World DLC, set for release in August, will give players a very different perspective on the world of Fallout 4. They will lead a gang of Raiders, for starters.

　　Take a trip to Nuka-World, a vast amusement park now a lawless city of Raiders. Explore an all-new region with an open wasteland and park zones like Safari Adventure, Dry Rock Gulch, Kiddie Kingdom, and the Galactic Zone. Lead lethal gangs of Raiders and use them to conquer settlements, bending the Commonwealth to your will. Nuka-World features new quests, Raiders, weapons, creatures, and more. Enjoy the ride!

　　last one

　　— Pete Hines (@DCDeacon) July 4, 2016

　　There's another DLC set to launch before Nuka-World, though: the Vault-Tec Workshop, scheduled for July.

　　Build a brighter future underground with the all-new Vault-Tec Workshop. Create a massive Vault and attract new Dwellers using pre-war industrial kits complete with retro-nostalgic furniture, lighting, and art. And like every good Overseer, run Vault-Tec approved experiments on your Dwellers to learn what makes an ideal citizen. Vault-Tec has given you the tools, the rest is up to you!

　　After the Nuka-World DLC, it's fair to expect some additional Fallout 4 patches. Otherwise, it looks like Bethesda will be going forward with their big projects.