DLC Attack of the Jack!
Jacks contingency plan after his death was set in motion when his heart stopped. A Hyperion factory that mass produces robotic Jacks using his AI sets to go after the Eridians to try and control the Vaults. After the Eridians take heavy loss against the Hyperion robots, Maliwan (after technology) and Dahl (after resources) go in a pact to make a sprint to reap some of the profits of the fallen Eridians. The Vault Hunters show up along with Atlas and Jakobs to stop them. As the battle rages, the VH’s main objective is to get to Hyperion who have slaughtered/captured most the Eridians and started to open vaults. A total of 2 vaults have been opened and as you discover and destroyed, the ‘weapons’ are missing. The VH’s stop 1 vault from being completely opened as half the ‘weapon’ is cut in half with it closing but still puts up a vicious fight. After battling, the Vault hunters set off to make is to a 4th vault which they see Hyperion trying to capture/tame the ‘weapon’. The VH’s release some Eridians who put up a distraction. Hyperion who have to now face VH’s and Eridians, start defending the ‘weapon’ as it brakes free and now another boss fight starts. Once settled, the Eridians tell the VH that the 5th Vault requires 2 ‘weapons’ to open. Each ‘weapons’ arm it turns out can be used as a key. Players must collect the arm piece of each the previous ‘weapons’ and head to the last vault. Jakobs, Atlas and the VH show up to battle Hyperion, while Mailwan and Dahl show up as well. The arms are inserted to find the 2 weapons that escaped opening a door to the 5th vault after/during the battle. You run in a room where you see the ‘weapons’ opening the vault. While the vault is being opened you must attack each one while its arm is stuck in the vault, charging the door to open. After both are dead, the vault is open only partially. The Eridians, Jakobs, and Atlas meet up with you. You must go through the vault. Enter Raid boss!
(I am bored at work)