Dahl's books were later used for animation with James and the Giant Peach and The Fantastic Mr. Fox. And you can't forget Charlie and the Chocolate Factory, (except for, maybe Tim Burton's version.)
Steven also mentioned that Virgil Ross was the key animator and character designer on the Gremlin. Ross told Steven in secret that working on the Gremlin was one of his most favorite projects. So keep it under your hats folks! Loose lips an' all that.