Crucible lead designer Lars Bakken and world lead designer Steve Cotton will be on hand to discuss new maps, modes and features for the game's competitive multiplayer component. They'll be chatting while two fireteams take each other on. Bungie will also debut a developer diary about Rise of Iron, with commentary from the team about every element of the expansion.
Destiny: Rise of Iron is set for release Sept. 20 on PlayStation 4 and Xbox One. For more, read our interview from E3.