A device often referred to as "setting the scene." in this case the theme of Act 3's main story line.
Right but in Acts 1 and 2 this was still done through your character's POV. Even the way Gortash and Orin are first introduced is done this way with your party being shown eavesdropping on their conversation with Ketheric
It just seems strange to me that this is the one time the game completely breaks formula and shows us something the player characters have no way of knowing
