According to Variety, Chris Wedge (Ice Age) is going to direct the animated Leaf Men for Fox. Wedge's Blue Sky Studios will be producing.
The film will be an adaptation of the William Joyce illustrated children's book "The Leaf Men and the Brave Good Bugs." The script was written by Jim Hart.
Initially Leaf Men was set up at Fox then it wasn't. So Wedge took it to Pixar. Wedge has been close to Pixar's John Lasseter since they made Tron.
The deal with Disney and Pixar was thwarted when it turned out Fox wanted Wedge to make Leaf Men for them.
In the story of Leaf Men "a troop of bugs" do everything they can to save a garden from the wrath of an evil spider queen. With nowhere left to turn, the bugs ask the Leaf Men for help.