Todd Pletcher is back at the Breeders’ Cup in a big way again, and this time he’s hoping for better results than last year. The nation’s leading trainer sent out a record 17 horses in seven of eight Breeders’ Cup races at Churchill Downs in 2006, but he never made it to the winner’s circle. His only consolation was nearly $3.5 million in purse money, primarily from three second- and three…