My theory is that the traveler is the forge of gods and is trying to turn us into gods but the cabal are trying to prevent us from doing that and getting are new subclass (cosmic or light) so they assault the city and the raid will be in the city or inside of the traveler or...... The darkness is creating all these hive gods and the cabal that received that signal attack the darkness and try to stop it but if the darkness gets destroyed then the traveler will heal and move on so we can't lose the traveler or we lose our powers so we join forces with the cabal !!!!!