The short preview snippet shows off Masaaki Yuasa's wild free-flowing style.
Adventure Time fans who are also into Anime are in for a treat this month, as the Wondercon 2014 Adventure Time panel has revealed that anime artist Masaaki Yuasa (Samurai Champloo, Ping Pong, Kick-heart) will be guest animating a full episode of the show. The episode, entitled "food chain" follows Finn and Jake as they join a field trip to the Candy Kingdom Museum of Natural History.
A sneak-peak for the episode is available to the right, and it shows off Yuasa's signature wild free-flowing style - quite a departure from your traditional Adventure Time episode. The episode was reportedly done with no outside supervision from the American Adventure Time team, and was animated in Japan by Yuasa and (presumably) Tatsunoko Productions.
For purists of the show, you'll be relieved to know that the episode will be strictly "non-canon", and won't fit into the ever expanding Adventure Time lore.
Adventure Time has been gaining a lot of popularity over in Japan, as it's an American cartoon that has an almost anime feel to it - especially in the way that most episodes contribute to an over-arching season plot. It's certainly very cool to see collaborations like this, and hopefully we will see more in the future.