My idea would involve the PCs playing as a group of kids who have been magically transported to the Land of Ooo, trying to figure out how it is that they arrived and how they can return home. Summoned by Princess Bubblegum, the ruler of Candy Kingdom, they learn that Ooo's two greatest adventurers (Finn and Jake) have dissappeared and that a great evil is coming. It is up to the PCs to find the duo and save the world.
While it's not the most original storyline in the world, I feel that it's something that suits the Adventure Time perfectly. A group of kids in a magical world partaking in a dungeon crawling adventure full of peril....what's there not to love?
