JPMorgan offered a preview of third-quarter earnings for Mattel, Inc. (NASDAQ:MAT) and Hasbro, Inc. (NASDAQ:HAS) before the toymakers report later this week. Mattel: JPMorgan analyst Christopher Horvers highlighted Mattel’s success in expanding shelf space at major retail partners which coincides with Barbie’s 65th Anniversary and the release of Mini Barbie Land and Barbie Dreamworld. Read Next: Nuclear Energy Stocks Are Hot: Here’s A List Of Tickers To Watch While the analyst said the stock’s setup is starting to improve, he also warned consumers remain soft and “very choiceful in how they sp…