Bethesda just showed off some new DLC for Fallout 4 including contraptions and a new story based DLC.
More details are available in the video below:
Contraptions has a workshop that lets you tinker with weapons and is out next week. Vault Tec lets you build your own workshop and vault and experiment on the dwellers. This releases in July. The Nuka World expansion is a story DLC in a wasteland. Nuka World is set to release in August.