Dragonshrines can be found in the contested zone of Dragonblight. There is one for each dragonflight, five in total, and these are the places that dragons come to when their life is at an end. These dragonshrines are very different from one another and each has its own storyline. The Red Dragonshrine is under attack from the Scourge and players can quest there to help the flight. There is also the Bronze dragonflight shrine, who were at the Caverns of Time, and the leader of this dragonflight, Nozdormu, can shift time and send players back and forth. The Green Dragonshrine needs help from players because Ysera, affected by the Nightmare, has commanded the defenders of the dragonshrine to attack anyone that is not part of the green dragonflight — instead of just the Scourge as intended. The Black Dragonshrine also has quests involved with it against the Scourge. The Blue Dragonshrine is a hostile area. In addition to the problems facing the individual dragonshrines, the dragons have to contend with Arthas, who is taking the bones of dead dragons and using them to create Frost wyrms.
The fact that Nozdormu is the leader of one of the dragonshrines, and can shift time, might hint that something along those lines might take place at the Bronze Dragonshrine.