David Petersen's Mouse Guard is in development for a CGI/live-action feature film by 20th Century Fox, according to The Hollywood Reporter. Described as taking a Jungle Book-style approach to the animal characters, this Mouse Guard adaptation will be written by Gary Whitta, with Dawn of the Planet of the Apes director Matt Reeves acting as producer alongside BOOM! Studios' Ross Richie and Stephen Christy. Petersen will also act as a co-producer.
Petersen is currently working on an adaptation of The Wind in the Willows for IDW Publishing, with plans to return for a new volume of Mouse Guard in 2017.