Time for the one sentence of info on the Adventure Time film. Cartoon Network is working with Warner Bros to make a Adventure Time movie , produced by Chris McKay and Roy Lee, from the Lego Movie. Wow Warner Bros, way to do something good again. You had the Lego Movie and know this, so like two things. There are no other details online at this time, everything else will be an article with worthless facts you already know if you're a fan.