Retailers including Walmart and Target are giving prominent shelf space to Mattel’s Barbie brand of toys after the launch of a new film, according to press reports. Yet, Mattel may already be slowing shipments of the line with U.S. seaborne imports linked to the brand down by 6.4% year over year in the first three weeks of September after a 15.2% gain in August. Toy manufacturers face a particularly challenging peak season with the need to back the right brands as well as navigating potential supply chain disruptions linked to COVID-19. U.S. seaborne imports of toys fell by 11.8% year ov...