This will be the second adaptation of the novel. In 1982, "The Secret of NIMH" was released, based on the book. It followed a mouse, Mrs. Brisby (changed due to copyright fears), who needs to move her family due to the threat of a field plow. She faces adversity when her son falls ill.
No definite word if the film will be animated, or a live action/animation combo, but it is rumored to be the latter.
