Announced as a sequel to BL1 and a Sequel to BL2, with you playing as one of 4 characters that have played a part in the other two games and set on the Moon Elipsis working for/with Handsome Jack. Developed by 2K AustraliaKotaku
Athena, the Gladiator
Wilhelm, the Enforcer (pre-mechanization)
Nisha, the Lawbringer
Claptrap, the Fragtrap
Box shot from the PS3 version
They've added lasers, freeze weaponry, low gravity and jetpacks to get around them, and oxygen as both a pickup and as a new way to attack your enemies (crack their mask to kill them by suffocation)
no specific release date yet other than later this year.