Elsa Keslassy International CorrespondentSony Pictures International Productions (SPIP) is joining forces with Ben Stassen, a veteran Belgian animation director and producer, and his producing partner Matthieu Zeller on “Chickenhare and the Hamster of Darkness,” an ambitious 3D-animated adventure film based on the Dark Horse comics.Stassen and Benjamin Mousquet will direct “Chickenhare and the Hamster of Darkness,” whose screenplay was written by Dave Collard, based on “Chickenhare,” the