"Though Senna and Lucian’s love survived even death, now they face the consequences of her rebirth. Senna knows what they have to do next, a secret gleaned within the lantern."
Thresh's buff confirmed.
Lucien cannot have two guns anymore and Treshs latern is broken now. Soooo Riot have to make a rework. But they wouldn't do this. The concept of Senna has a lot of logic problems after this trailer