Ponies in Equestria know almost nothing about dragons, and it needs to change. Spike's rampage in Ponyville has prompted Twilight to be tasked by Princess Celestia to study and learn about the beasts, and who better to learn from than a legendary tribe of ponies rumored to have been able to coexist with the beasts for centuries.
It's just a matter of finding them, and then convincing them to share their secrets.