You want to know my take on the story? Nozdormu actually controls the Infinite Dragonflight, and as he is master of time, he knows how everything will end, he just CAN'T TELL anyone, and he is everywhere at once. I think he is sending the Infinite Dragonflight back in time to screw with time to SAVE the world, and the Bronze Dragonflight are enlisting us to FIGHT the Infinite Dragonflight. Nozdormu is battling with his own flight in a way. So, we are basically screwing ourselves over. That's what I think anyways, would create a very interesting turn of events.