Lonesome Road is confirmed to be released in August, and the achievements have been revealed, although the amount of gamerscore or trophy type have not been revealed:

ED-Ecated: Found all of ED-E's upgrades in the Divide.

Condemned to repeat it: Decided the fate of all the Divide dwellers.

Hometown Hero: Completed Lonesome Road.

Rocket's Red Glare: Fully upgraded The Divide's signature weapon.

Warhead Hunter: Detonated all of the warheads in the Divide.