Author has written 2 stories for Batman, and His Dark Materials.
"Let me explain: there are dragons, and then there are drakons. Drakons are several millennia older than dragons, and much larger. They look like giant serpents. Most don't have wings. Most don't breathe fire (though some do). All are poisonous. All are immensely strong, with scales harder than titanium. Their eyes can paralyze you; not the turn-you-to-stone Medusa-type paralysis, but the oh-my-gods-that-big-snake-is-going-to-eat-me type of paralysis, which is just as bad."
-Rick Riordan, The Last Olympian
I don't associate much with the Riordan fandoms, but I still love the books and the concept of drakons. Fandoms I am involved with include DC, especially Batman and Teen Titans, as well as Danny Phantom, Marvel, especially Spider-Man, Merlin, Sherlock, Bleach, Sword Art Online, Ao No Exorcist, Fairy Tail, Nurarihyon No Mago, Avatar: The Last Airbender, How to Train Your Dragon, Rise of the Guardians, Final Fantasy VII, Final Fantasy XIII, Assassin's Creed, The Lord of the Rings, The Dresden Files, and others.