TarkirMentions Dragonlance, Council of Wyrms, and a MtG setting as 2 settings that feature dragons.
Indeed, I suspect that the character story table will have a few ideas for Paladins.I like the idea of riding a Dragonnel as a Paladin. Especially if your reflavor your Paladin abilities as being draconic, like a Conquest Paladin to be similar to Frightening Presence.