So we all know that the 2nd DLC will be about the House of Wolves revolting against the Queen. I've been trying to figure out how the Ahamkara will be introduced into the game as an enemy and I think this raid will be how. We know the fallen have already found and raided the Prison of Elders. Well, I believe the raid will consist of the House of Wolves gaining access to the prison, and releasing an Ahamkara that the queen was holding captive there. The first boss will most likely be some House of Wolves guard who is trying to deny you access to the prison, and the final boss will be some giant Ahamkara.