Bleeding Cool has a heard a rumor that The Walt Disney Company could be working on an animated movie based on a Marvel Comics property. Ever since Disney's purchase of Marvel Entertainment rumors have circulated that their animation department, or their other subsidiary Pixar, would work on a Marvel film.
Last July, Don Hall stated that he was working on a "secret project" that would get "geek communities" excited. Last week it was stated that Hall was working on a 2014/2015 secret project that "will be a marvelously unexpected project if it ever gets the green light..." The author notes the specific use of the word marvelously.
However, the author also notes that there is no concrete proof of anything this project could be. Also, a single descriptive word could mean nothing. So consider this simply a rumor at the moment.