If the DLC was going to add anything to the story, I would like to see how Ave and Tannis try to lead the CR after Lilith disappears. From what I have seen so far neither of them seems like a capable leader.
A good setup would be remaining members of COV start to clash with a rising faction that has begun to warship the Firehawk (similar to BL2) With the stress rising, Ave and Tannis look for solutions. Tannis continues to look for clues of Lilith’s whereabouts, while Ava studies the book Maya dropped when she was killed. We as players learn from Ava that this book was imprinted with a portion of Mayas mind (using eridian technology), able to project an AI avatar that resembles Maya.
At the same time, the Psycho Kreig has learned of Maya death and has snipped, going on a rampage on Pandora. We as players are sent to stop him only to find destroyed bandit camps/outposts. When explored we learn from echo recordings left by members of COV that a buzz-axe wielding monster is killing anyone connected to Tyreen or Troy, regardless if they were loyal to them or not. The last echo is of a scientist begging for his life and is only spared when he says that he can bring back the pretty lady. The sane version of Krieg forces himself to the surface asking how this man can do what he says. Learning that he is a geneticist studying Sirens, and how they work, he promises that if he can get Mayas DNA he can bring her back.
While Kreig’s psychotic side fights for control, the sane side explains that this is their only chance to see her again. Grabbing a pouch from his belt he throws it at the scientist, revealing a lock hair Maya left as a promise. When asked if that will work, the scientist says yes, and is dragged off by Kreig to an unknown location.
(A few days to a week later, after searching several of Hyperion, Atlas, and Dahl bases/labs) Back on the Sanctuary III, the VH’s, Tannis, Ava, and the Maya AI discuss what to do next. The scientist sends out a message over an open channel begging for help, promising rewards to anyone that can save him.
Knowing that message will have attracted COV and more, the VH along with Ava, and the Maya AI head to the new location. Once there, players must fight their way through various enemies to reach the lab. Upon arrival, Krieg attacks us protecting a large tank with a silhouette of a woman inside, after a time a cut-scene plays where the Maya AI spawns asking Krieg to stop, allowing his more sane side to come out.
During the awkward reunion, the scientist tries to flee only for Ava to stop him in a phaselock. When ordered to explain if he really cloned Maya. He directs us to the computer next to the tank, the VH’s flip a switch to reveal a perfect physical copy of Maya floating inside. However, he says that while the body is a perfect copy, the mind couldn’t be cloned. It would be as if it was a new person.
Begging to be released Ava drops him harshly on the floor, while the Maya AI looks at the clone alongside Krieg. She then asks the scientist if he had an imprint of her mind could he transfer it to the body? Taking a moment to think he says that in theory, it could work.
Suddenly the alarms got off and Ava orders everyone to leave, only for the Maya AI to stop her. Asking how long it would take to transfer her mind, we are told that it would take some time, but if the VH’s hold back the waves of enemies he could do it.
Ordering everyone to hold the enemies back the Maya AI asks Ava to give the scientist the book. Protesting Ava says that staying in this form means that she’ll never lose her again. Which the Maya AI reassures her that it will work and that now Ava needs to protect her. Reluctantly Ava gives the book to the scientist and he connects it to the tanks and begins the transfer.
After several waves of enemies fall the transfer is complete and Maya is released from the tank. Only for the alarms go off again signaling more enemies are coming, blocking all the exits. Helping Maya to her feet the scientist tells us that there is an emergency escape route that leads outside.
However, once we arrive we are told that the lab will start a count down to a self destruct, and unless someone holds the enemies back, we won’t be able to escape. Wanting to show that she is a worthy successor, Ava along side Krieg tell the VH’s to get Maya out of here. Maya protests, but Ava tells her a VH runs to the fire. Charging the enemies along side Krieg.
When we reach the exit we see the lab explode along with a large burst of energy. Moments later a spark of energy hits Maya causing her siren tattoos to return, collapsing to the ground crying. In the distance Krieg limps towards us with Ava in his arms.
A rough idea, but I think it would be interesting to see.