>> Diego Della Valle Has a Mystery Marquee Collaborator for Hogan Up His Sleeve —Diego Della Valle appointed Thakoon Panichgul two years ago to help oversee a newly-launched Hogan apparel collection, but the collaboration ended last season.  Now, Della Valle says his goal is to have Hogan clothing sales equal accessories sales within the next few years, and he's teasing an upcoming collaboration with a "marquee" name.  But who? He won't yet say. [WWD]