Dark Horizons points to the official website of Neil Gaiman, where the author writes that DreamWorks Animation has optioned his and Michael Reaves’ novel Interworld. The project is explained as “about a boy who finds himself in the middle of a war between two equally powerful forces, who joins a super-team consisting of versions of himself from different alternate realities to try and maintain the consmic balance.”
DreamWorks Animation considering Interworld