Under mounting toy pressures, Hasbro has a secret sauce that Mattel hasn’t matched
The gap is widening between rival toy makers Hasbro and Mattel — thanks in part to a 30-year-old trading card game. The toy giants have flip-flopped dominance in the space for decades, jockeying for the most coveted master licenses to put new fan favorites — Disney princesses and “Star Wars” characters among them — on…