Lore Recap: Dragonflight's Setting and Story Takes Us Back to the Dragon Isles

wowhead.com:

In World of Warcraft: Dragonflight, we will visit the long-lost Dragon Isles, where we will help the dragonflights grapple with their legacy, explore their ancient home, and help them face the challenges of old, recently awakened threats.

Unsurprisingly, World of Warcraft: Dragonflight finally sends us to the Dragon Isles, the ancient and mysterious home of Azeroth's dragons. A zone that was cut during the development of the original World of Warcraft, players have speculated about it making an appearance for many years — especially once it was revealed that Wrathion has been searching for the location of the Dragon Isles. As their ancestral home, the Dragon Isles are described as the broodlands of the dragonflights, where they needed and built their civilizations. However, once the Sundering broke the world, elemental energy drained away from the land and left it dormant. Though they had to leave the Dragon Isles behind, the dragonflights left behind Titan Watchers to care for the land. If the magic ever returned to the land, the Watchers would need to send out the message that would summon the Dragonflights home, which is exactly what happens in the cinematic announcement trailer for Dragonflight.

Early dragons, or proto-dragons, were very different from the dragons we know today, but that changed with the creation of the Dragon Aspects, where the different dragonflights were given their power. As the dragonflights return home, they will find the land has changed a great deal since they left. And, with the awakening of the land, old threats have awakened as well. One of the threats specifically mentioned are the Djaradin, a race of elemental